Bourbon Ají Coffee Explained: The Rare Colombian Variety That Tastes Nothing Like Chili

 Has anyone else noticed that we haven’t heard much about “Bourbon Ají” lately? In fact, I’m sure plenty of coffee drinkers still have no idea what it is. Looking back at my previous posts, I usually only mentioned Bourbon Ají in café visits or in a dedicated flavor review, but I never really wrote about its background in detail. Recently, though, I found myself thinking about it again, so I figured it was finally time to dedicate an entire article to this “coffee aristocrat” whose name has seriously held it back.

Bourbon Ají had a brief moment in the spotlight a few years ago, largely thanks to its impressive performance in the 2021 COE (Cup of Excellence), where it placed sixth. I still remember having the chance to taste some of the competition samples before the event itself. During a blind cupping session, Bourbon Ají immediately stood out to me and left a lasting impression.

So where exactly does this strange name come from? And does it actually have anything to do with chili peppers?

Well, not really. The coffee isn’t “spicy” at all. It’s simply a coffee variety that resembles chili peppers. In Colombia, growers noticed that the cherries were long and pointed, much like ají peppers, and even the green beans carried a faint spicy-herbal aroma. That’s how it earned the name “Bourbon Ají.”

What makes it even more interesting is that despite the word “Bourbon” in its name, recent genetic testing has confirmed that Bourbon Ají is not actually part of the Bourbon family. Instead, it’s an ancient Ethiopian landrace variety, genetically much closer to the legendary Geisha.

Honestly, when I first evaluated Bourbon Ají myself, the dry fragrance immediately revealed a noticeable spice character — something reminiscent of lightly charred peppers. But once brewed, the cup settles back into a much more familiar and elegant coffee profile. I often find juicy notes of apricot and peach layered together with bright, refreshing acidity that makes your mouth water. Some Bourbon Ají lots also carry delicate hints of ginger, lemongrass, or Earl Grey tea-like spice. Overall, it’s best known for its refined florals and remarkable complexity.

That said, have you noticed how little people talk about Bourbon Ají these days?

It reminds me of varieties like Sidra or Pink Bourbon, which were once considered trendy and exotic but have gradually become more common everyday specialty coffees. Coffee varieties, in many ways, follow trends just like fashion. Different years bring different obsessions.

A couple of years ago, Bourbon Ají exploded on social media and within the specialty coffee scene thanks to its unusual name and fascinating backstory. It quickly became a highly sought-after “internet-famous” bean. But once the excitement of novelty faded, it naturally returned to a smaller niche audience of dedicated specialty coffee enthusiasts, and demand dropped accordingly.

There’s also a more practical reason behind its disappearance from the spotlight: Bourbon Ají is still an extremely rare variety. Although ancient in origin, it was only relatively recently rediscovered and is currently grown in limited quantities within specific micro-regions of Colombia. Production volumes are incredibly small. For most roasters, it’s more of an occasional limited-release gem rather than a consistently available staple coffee.

From a farmer’s perspective, planting high-yield, disease-resistant varieties simply makes more economic sense. Bourbon Ají produces lower yields and is more difficult to cultivate. Without strong enough market prices, there’s very little incentive for farmers to switch over to large-scale production.

And then there’s the name itself — both its greatest advantage and its biggest weakness.

The word “ají” helped the coffee go viral in the beginning, but it also created confusion among consumers. Many people naturally wondered, “Wait… is this coffee actually spicy?” Once the novelty wore off, the unusual name may have even become a barrier preventing repeat purchases.

So to clarify once again: the “spice” in Bourbon Ají does not refer to the burning heat of capsaicin. That’s exactly why I always emphasize that it isn’t actually spicy. Instead, it carries a gentle herbal sweetness and aromatic spice character somewhat reminiscent of green peppers, bell peppers, and fresh herbs.

If you’re interested in exploring rare coffee varieties with unique flavor profiles like this, keep an eye on limited releases from specialty coffee roasters. Finding a great Bourbon Ají often requires a little luck — but when you do, it’s absolutely worth the experience.

Virgin Boy Egg Americano: The Weird Coffee Trend Blending Shock Culture and Tradition in China

 I used to think I had already become completely desensitized to bizarre coffee trends. Cilantro Americanos? Century egg lattes? I’d seen it all. Nothing could really shock me anymore.

But then, not long ago, I came across a news clip on short-form video platforms about a café in Zhejiang launching something called a “Virgin Boy Egg Americano.” At that exact moment, my brain practically short-circuited. What I once considered “dark cuisine” suddenly looked mild in comparison.

Young people naturally crave novelty and curiosity during certain stages of life. And in today’s internet-driven world, where trends spread at lightning speed, the rapid cycle of online attention constantly pushes industries to come up with increasingly outrageous ideas. Coffee culture, whose core audience is already young people, has become especially vulnerable to these surreal experiments.

Now, before this “Virgin Boy Egg Americano,” I had never even heard of virgin boy eggs, let alone tried them. But after digging deeper, I realized this bizarre food actually represents a strange collision between traditional folklore, modern medical perspectives, and internet traffic culture.

Since “virgin boy eggs” are considered a local intangible cultural heritage food in parts of Zhejiang—yes, apparently we are calling it a “delicacy”—many people outside the region may not know what they are. So here’s the explanation.

This dish originates from Dongyang, Zhejiang Province, and it’s a legitimate item on the local non-material cultural heritage list. The eggs are traditionally boiled using the urine of boys under the age of ten. Girls are not acceptable, and boys who are too old are also excluded. Every spring, around March and April, schools and kindergartens in the area reportedly place plastic buckets inside boys’ restrooms specifically to collect urine, and in some places there are even lines of people waiting to collect it.

The preparation process is equally intense. Eggs are repeatedly simmered in the urine for an entire day or even longer, while more urine is continuously added during the cooking process. Afterward, the eggs are roasted over charcoal until the outer layer develops a smoky aroma.

According to local traditional beliefs, eating these eggs can help prevent spring fatigue, avoid heatstroke during summer, nourish the body, reduce internal heat, and improve blood circulation. There are even references connected to traditional Chinese medicine texts like Compendium of Materia Medica, which describe children’s urine as “salty, cold, and non-toxic.” Sediment formed from aged urine was also historically used as a medicinal substance.

From the perspective of modern medicine, however, most people remain highly skeptical. Urine is generally considered a waste product composed mainly of urea and inorganic salts, without any proven special health benefits. From a hygiene standpoint alone, it is obviously not something modern medicine encourages people to consume.

As for this “Virgin Boy Egg Americano,” the café reportedly serves it by first preparing a standard cup of Americano coffee, then hanging a skewer of virgin boy eggs on the rim of the cup. By default, customers eat them separately—one bite of egg, one sip of coffee. But some adventurous customers apparently ask for the eggs to be crushed directly into the coffee itself.

Personally, I haven’t tried virgin boy eggs, but based on online descriptions and customer reactions, the eggs are extremely salty after being boiled in urine for so long without additional spices. The egg whites turn dark brown or yellowish, often becoming firm and chewy, while carrying a strong ammonia-like smell. The coffee itself is usually just a regular blended Americano. But because the salty, bitter aftertaste of the egg lingers in your mouth, combining it with the bold bitterness of black coffee apparently creates an overwhelming “stacked debuff” experience. Honestly, I can barely imagine it.

Of course, I’m not sharing this to recommend that anyone actually try it. I’m not even convinced it tastes good. What interests me more is the cultural logic behind this kind of combination.

On the positive side, virgin boy eggs are indeed a local specialty from Dongyang, so the café may genuinely have intended to merge traditional intangible cultural heritage with modern everyday beverages in order to attract younger audiences and keep the tradition visible. But we also have to ask whether this fusion makes any real sense.

Do the flavors naturally complement each other? Is there any meaningful culinary connection between specialty coffee culture and boiled urine eggs? Clearly not. Which makes the pairing feel strangely forced and difficult to understand.

At the end of the day, though, it undeniably succeeds in the economy of curiosity and internet virality. What the café is really selling may not be coffee at all, but pure shock value. The massive contrast itself becomes the product.

According to news reports, this bizarre drink can reportedly sell over a hundred cups per day, with many customers buying it simply to post photos on social media. And honestly, I think once something like virgin boy eggs is removed from its original cultural context and awkwardly merged with modern specialty coffee culture, the result can feel deeply uncomfortable.

The cultural symbol becomes hollowed out, commercialized, and repackaged purely for attention.

And maybe that’s what today’s coffee industry increasingly looks like. Coffee is no longer just a beverage. It has become a performative medium—a stage for spectacle. Behind these increasingly absurd creations, you can almost sense the desperation and madness of an industry chasing traffic at any cost.

Can Unripe Coffee Cherries Become Specialty Coffee? The Future of Zero-Waste Coffee Processing

 A while ago, I came across a post published by a coffee estate. The original message read:

“Drying fully unripe coffee cherries on top drying raised beds. These cherries get picked at the very end of the season. If we do not pick them and let them stay on the plant’s branches, in most cases the plant will not have the capacity to prepare next season’s flower buds.”

This was the first time I had ever seen “unripe green coffee cherries” intentionally dried on raised beds. In the grading system for green coffee beans, beans processed from unripe cherries are usually considered low-grade defect beans. In specialty coffee, even a small number of unripe cherries can introduce the notorious “underdeveloped” flavor that negatively affects an entire batch.

The reason is simple: unripe cherries have not yet accumulated enough nutrients. Their sugar content and aromatic compounds are severely underdeveloped. After processing, the green beans often appear shriveled and pale. Once roasted, they produce grassy, vegetal, astringent flavors with sharp and unpleasant acidity, completely failing to express the normal flavor potential of coffee.

Most unripe cherries are removed during sorting at farms or processing stations. They are then sold cheaply in bulk to large commodity coffee buyers and pushed into commercial channels where quality standards are far lower. Eventually, they are blended into massive volumes of commercial coffee and used for instant coffee, 3-in-1 mixes, or extremely dark roasted low-cost blends. Heavy roasting and additives help mask the unpleasant flavors of the unripe beans.

In regions where water resources or processing capacity are limited, these discarded unripe cherries, damaged cherries, and overripe fruits are often grouped together and processed using the simplest natural drying methods. The resulting coffee becomes the most basic form of commodity-grade coffee.

At the same time, it’s also important to understand how leaving these cherries on the tree affects the coffee plant itself.

After researching the topic, I found that coffee trees, as perennial woody plants, must accomplish two things simultaneously every year: producing fruit and preparing for the next season. A coffee tree only has a limited nutrient supply. When unripe cherries remain on the branches because they were not harvested in time, they become stubborn nutrient consumers. Until they fully dry out and fall off naturally, they continue drawing carbohydrates and minerals from the plant.

Those nutrients should instead be supporting new branch growth and flower bud differentiation for the next harvest cycle.

What makes this even more critical is that the period of flower bud formation often overlaps with the fruit maturation period. If immature cherries are left on the tree, they effectively compete with developing flower buds for resources, reducing either the quantity or quality of future blossoms. That is why, during the final harvest round, farmers typically strip every remaining cherry from the tree, regardless of ripeness.

Now that we understand both the quality limitations of unripe cherries and their impact on future harvests, the issue becomes more complicated economically. Farmers may spend large amounts of labor harvesting these cherries while receiving little financial return in exchange.

So what should producers do?

This brings us back to a topic I’ve discussed before: the growing effort to find ways of turning immature coffee cherries into higher-quality coffee. In many ways, this represents a shift from simply discarding defects to attempting technological value creation.

In the past, unripe cherries were treated almost like agricultural waste. But recent studies suggest that, under specific processing methods, these cherries may actually be transformed into something commercially valuable.

One area of interest involves chlorogenic acids. Since chlorogenic acids decrease during roasting, some researchers are exploring ways to cultivate or process coffee beans that retain higher levels of these compounds. Experimental post-harvest techniques have been developed to improve the quality and flavor complexity of coffee made from immature cherries.

The concept behind these projects is fairly straightforward. Unripe beans are naturally more astringent, but they also contain higher levels of antioxidants. By using innovative processing techniques to reduce harshness and improve flavor expression, producers may eventually create coffees that appeal to health-conscious consumers. In other words, the “health coffee” angle suddenly becomes part of the conversation.

Other studies suggest that anaerobic fermentation may help enhance the flavor of immature coffee cherries. The unpleasant taste of underdeveloped coffee is largely linked to excessive levels of chlorogenic acids, certain alkaloids, and pyrazine compounds. Under controlled fermentation conditions, however, immature coffee beans may develop sensory characteristics comparable to — or in some cases even better than — coffees made solely from ripe cherries.

During fermentation, microbial activity and the seed’s own metabolic processes can generate new flavor precursor compounds. Later, during roasting, these compounds are transformed through the Maillard reaction into more pleasant aromas and flavors.

That said, based on everything I’ve observed and researched — including topics I’ve shared before — most of these developments remain largely in the laboratory or pilot-testing stage. Large-scale commercial adoption is still a long way off.

And even if these specially processed immature coffees eventually enter the market, transparency and traceability will become extremely important.

One thing we should remain very clear about is this: good processing techniques amplify the potential of good coffee; they do not magically turn bad coffee into specialty coffee.

At best, these technologies may transform immature coffee from “undrinkable” into “surprisingly decent.” But they still cannot truly replicate the complexity, sweetness, and refinement of top-quality fully ripe coffee.

Perhaps in the future we’ll see a new category of “zero-waste” coffees emerge in the market. Still, immature coffee beans carry a deeply rooted negative reputation among consumers. How the industry communicates these products transparently — and whether consumers are willing to accept them — may become an entirely new challenge of its own.

Why Highly Sensitive People Make Exceptional Coffee Tasters | The Hidden Gift of HSPs

 Today, I want to share something a little more niche and deeply personal. It touches on certain traits that define who I am, and in many ways, this piece is about connecting psychology with sensory experience. Before I begin, I need to talk about a group known as Highly Sensitive People (HSPs). I myself am a very typical HSP.

People like us often grow up hearing things like, “You’re too sensitive,” or “You think too much.” Over time, this can create a lingering feeling of being fundamentally different from everyone else. But what many fail to realize is that this trait is actually an incredibly refined gift system. And in the world of coffee tasting, it almost feels like a playground specifically designed for HSPs.

I wanted to write this piece for those of you who are both highly sensitive and passionate about coffee. Through this screen, I hope to offer a sense of resonance, understanding, and recognition. I truly believe that highly sensitive people are misunderstood talents within the coffee world. Our nervous systems were never meant simply to endure the chaos of the world — they were also built to detect the most delicate shifts in flavor.

A sensitive palate is not a weakness. In a single cup of coffee, it can feel as though seven hundred different emotions are living inside me. When coffee meets sensitivity, it isn’t pickiness — it’s precision. In fact, I’d even say that for highly sensitive people, your sensitivity is the best cupping tool you could ever have. The transformation from “someone easily overstimulated” into a “hunter of flavor nuances” can be profoundly healing.

Highly sensitive people tend to process stimulation — including taste, aroma, and even caffeine’s physical effects — much more deeply than others. We also become overloaded more easily. Yet the very traits that exhaust you in daily life can become superpowers when it comes to coffee tasting. That’s one of the biggest reasons why I love coffee so much. In this world, my natural sensitivities feel amplified in the best possible way, turning something that once drained me into something that feels deeply empowering.

The mind of an HSP naturally connects every experience to layers of background, memory, detail, and meaning. We process information with unusual depth, which often shows up as slow decision-making and chronic overthinking. At the same time, this also explains why many highly sensitive people struggle with superficial socializing or large gatherings. Most of us prefer solitude, quiet reflection, or conversations with lifelong friends. A rich inner world matters far more to us than social performance.

Our thinking tends to be expansive and multi-threaded rather than strictly linear. Perhaps that’s why highly sensitive people are often perceived as intelligent. And this same mental wiring allows us to process coffee on multiple levels at once: flavor complexity, texture, temperature, aftertaste, and memory associations all simultaneously. Even without formal sensory training, many HSPs instinctively capture and remember flavors they’ve experienced. In everyday life, we unconsciously build an enormous internal archive of sensory references that sharpens our perception over time.

When highly sensitive people receive more stimulation than they can process, exhaustion or emotional overwhelm can follow. Emotional responses tend to run deep — both joy and discomfort are felt intensely. But the upside is extraordinary empathy. For many friends, HSPs feel almost like a source of light. Of course, that same empathy can also make us vulnerable to absorbing the emotions of others. Loud environments, bright lights, and multitasking can quickly become emotionally draining.

Yet this sensitivity also gives us an extraordinary awareness of the emotional texture of flavor. We can sense whether a coffee feels “bright and joyful” or “muted and heavy.” We notice tiny details others overlook: subtle sounds, faint aromas, slight temperature shifts, and delicate textural differences. We can even distinguish subcategories within a single flavor note — separating raspberry from blueberry, or blackcurrant from generic “berry.”

Whenever I visit a café, I always record my immediate flavor impressions and emotional reactions in my private social feed. I call these entries my “café journals” and “flavor notes.” Capturing those fleeting moments helps me preserve the emotional truth of the experience so I can later express it clearly in a calmer state of mind.

Sometimes friends leave comments like, “Your palate is unbelievable.” But honestly, I’ve never gone through systematic sensory training, nor have I ever been particularly interested in certifications like Q Grader. I believe that simply drinking widely, paying attention, and consistently documenting flavors naturally leads to dramatic sensory growth. Though I’ll admit — perhaps there really is a bit of talent involved.

When most people taste a coffee, they might simply think: “acidic.” But for a highly sensitive person, the brain instinctively breaks that sensation down into dimensions. What kind of acidity is it? Is it bright and sparkling, or soft and rounded with sweetness underneath? What accompanies the acidity? Is there sweetness balancing it, or bitterness supporting it? How does the acidity evolve over time — in the first second, the middle palate, and the lingering finish?

This isn’t a learned technique. It’s simply the brain’s default operating system. Our neural pathways automatically expand a single sensation into a multidimensional map.

What’s even more fascinating is that many of the most beautiful flavors in specialty coffee are fragile, fleeting, and easily overshadowed. Because highly sensitive people have lower sensory thresholds, we don’t need intense stimulation to perceive these nuances. That makes this trait incredibly valuable in coffee tasting. While others may need deliberate training and intense focus to occasionally detect such details, HSPs often receive them effortlessly and automatically. That’s also why highly sensitive tasters tend to describe flavor with extraordinary precision and structural detail.

Many HSPs also naturally experience cross-sensory associations while tasting coffee. This isn’t poetic exaggeration — it’s a genuine form of sensory blending. For example, whenever I drink Yemeni coffee, it feels wild, untamed, and strangely seductive. Coffees brewed through flannel filters or extreme extraction methods often feel incredibly velvety, as though the liquid glides softly across the tongue and slips effortlessly into the mouth.

Because of this, my tasting notes never feel like dry lists of flavor descriptors. They become miniature narratives filled with warmth, imagery, and emotion. And I think that’s why many people who read my reviews say they feel as if they’ve personally tasted the coffee themselves. In the world of specialty coffee, this kind of emotional tasting language is actually one of the highest forms of communication.

Highly sensitive people also tend to compare and archive every new sensory experience against a vast database of past memories. Taste a “berry note,” and the brain instantly retrieves every berry you’ve ever eaten. Taste sweetness, and the mind doesn’t stop at the word “sweet.” Instead, it differentiates: the transparent sweetness of sugarcane juice, the floral sweetness of honey, the bittersweet depth of caramel, or the juicy sweetness of ripe fruit balanced by acidity.

To be honest, I’ve never intentionally memorized a flavor wheel. Sometimes I feel like my brain itself is already a highly sophisticated sensory dictionary.

It may sound a little mystical, but within the language of specialty coffee, coffee feels alive — and highly sensitive people are often the ones capable of sensing that life most clearly.

As for daily coffee habits, I personally believe that highly sensitive people shouldn’t drink coffee merely for energy or social belonging. Coffee should offer a controllable, warm, layered, and non-aggressive sensory experience. Ideally, it’s best enjoyed in the morning, giving the body an entire afternoon and evening to metabolize even small amounts of caffeine.

And above all, trust your own feelings.

If a certain coffee leaves your mind buzzing, your stomach tight, or your finish bitter and drying, that doesn’t mean you “don’t understand coffee.” It simply means your nervous system is helping you choose what truly suits you.

And to all the “angels” scattered quietly throughout this world — yes, I genuinely believe highly sensitive people are the ones repairing the cracks of the world — you deserve a cup of coffee that feels like a peaceful afternoon: gentle, profound, and never rushing you.

Take your time.

You’re doing beautifully.

Wild Pigeon Coffee Review: Is No. 5 Hang Kong Road the Ultimate Espresso Blend?

 The roaster behind the beans I’m reviewing today is an "old friend" I’ve shared before. They are one of my personal favorites for specialty coffee because their roasting is incredibly consistent, and the value for the money is top-notch. In fact, my previous reviews of "Wild Pigeon" beans have seen some of my highest readerships ever, and many of you are already fans yourselves—it seems great minds really do think alike! I’ve always been partial to their espresso beans; whether it’s a blend or a Single Origin Espresso (SOE), they always deliver a fantastic flavor profile while ensuring a consistent experience with every cup. It’s hard not to love that.

In the realm of dark and medium-dark roasts, "Wild Pigeon" offers several espresso blends with different recipes. I personally chose the "Wild Pigeon No. 5 Hang Kong Road." This is a medium-dark blend of Ethiopian, Colombian, and Rwandan beans. Just by looking at the regions, you can tell it’s a "Golden Trio" combo, where each origin plays a distinct and complementary role. The Ethiopian beans act as the soul of the blend, providing fresh citrus and clean acidity—the "game-changer" that breaks up the heaviness of a medium-dark roast. The Colombian beans serve as the bridge, balancing sweetness and soft body; they are the "glue" that connects acidity with bitterness, and fruitiness with nuttiness. Finally, the Rwandan beans provide the foundation, offering a solid, heavy base of dark chocolate and nuts that anchors the body and flavor.

The dry aroma of these beans right after grinding is dominated by chocolate, layered with nutty notes. If you’re thinking this sounds like a typical traditional blend, here’s the twist: you can clearly catch a clean, citrusy acidity in the scent. It is an exceptionally clean medium-dark roast—so clean, in fact, that it almost defies its roast level. There’s no trace of smoke or ashiness. It’s simultaneously bold and heavy yet fresh and clean. These descriptions might seem contradictory, but they make you look forward to every shot. It’s clearly another "powerhouse" espresso blend with rock-solid consistency.

Let’s start with the espresso extraction. Any espresso-based drink starts with the shot, and these beans are "universal" in terms of extraction. They consistently produce a rich crema and a deep aroma, making them suitable for almost any coffee drink. You don’t even have to obsess over the exact ratios because the flavor presence is so strong. The crema is incredibly thick, bursting with wet aromas of chocolate and nuts. The first sip is a pleasant surprise: a gentle, citrusy acidity hits first. This acidity is accompanied by sweetness, so it doesn't feel sharp or overly bright. Then, it transitions into dark chocolate and nutty notes, finishing with a balanced, toffee-like sweetness in the aftertaste.

That initial, distinct citrus acidity likely comes from the Ethiopian beans. Even at a medium-dark roast, the characteristic citrus and floral notes of Ethiopian coffee maintain a bright "backbone," preventing the cup from feeling dull. This, I believe, is the core expression that makes this recipe "classic yet elevated." The inclusion of Ethiopian beans gives this blend more layers and a surprising "front-end" experience, rather than just being a simple bitter-sweet chocolate bomb.

When Rwandan beans reach a medium-dark roast, their heavy body and clear chocolate profile come through perfectly, sometimes with hints of berry or tobacco. However, these beans perfectly avoid any smokiness, providing a solid, heavy body and abundant crema. Their presence ensures the coffee doesn't feel thin, giving it great impact and a supportive finish. Connecting all of this is the Colombian component. It isn’t as "jumpy" as the Ethiopian; instead, it brings nuts, caramel, and a soft fruity sweetness. The toffee finish and the overall smooth drinkability are largely thanks to the Colombian beans.

The most important aspect of its flavor profile is that it retains a bold, prominent character while maintaining balance and cleanliness. This is what you’d call a "signature house blend," meaning it has a high margin for error during brewing and stays consistent cup after cup. The core flavors will fill every drink you make.

Because of my personal preference, I usually go for light-roast espresso beans, so I prefer using medium-dark roasts like this for milk-based drinks. I specifically tried it in a Flat White, a Latte, and a Dirty. I found that while the flavor emphasis shifted slightly between them, the overall perception remained clean, balanced, and very smooth. In short, three thoughts will loop in your mind: Ethiopia surprises you (how is there citrus in a medium-dark?), Colombia keeps you comfortable (the sour, sweet, and bitter notes don't clash), and Rwanda makes you remember it (dark chocolate finish and heavy mouthfeel). It’s a "powerhouse" performance that is both complex and unified.

Why Coffee Beans Have Wrinkles: Roast Levels, Processing Methods, and Bean Structure Explained

 I don’t know if you’ve ever really taken a close look at the coffee beans you brew every day. Some beans have lots of wrinkles on the surface, while others look surprisingly smooth. So what actually causes that difference? Today, let’s talk a little about it — just enough to give you some fun coffee trivia to chat about with your barista, haha.

These wrinkles are actually caused by a kind of “shell collapse” that happens when the internal structure of the coffee bean goes through dramatic physical changes. Green coffee beans contain moisture and dense plant cell structures. During roasting, as the temperature rises, the water inside turns into steam, pressure builds up, and the gases try to escape outward. At the same time, structural materials like cellulose and lignin begin to soften and become more brittle under high heat.

After roasting, when the beans cool down, the remaining moisture and the carbon dioxide produced during roasting continue to slowly release from the bean. The cell walls that were once expanded by gas pressure begin to collapse as moisture and gas escape. Since the outer surface of the bean is less flexible than the internal cells, it can’t fully shrink back into a perfectly smooth shape. That’s what creates those uneven wrinkles and folds.

But then why do some beans still look smooth?

A lot of it comes down to roast level, bean density, and processing method. If you think about the smooth-looking beans you’ve seen, chances are many of them were light roasts. Lightly roasted beans expand less internally, experience shorter pressure buildup, and lose less moisture overall (usually around 12–15% weight loss during roasting). Because the cellular structure remains relatively intact, the surface stays tighter and smoother, with very few wrinkles.

The beans with the most obvious wrinkles are usually medium-dark roasts. These beans expand significantly during roasting, the surface stretches outward, and then they lose a large amount of moisture (typically 15–18% weight loss) while releasing gas. Once cooled, the structure collapses inward, creating those classic walnut-shell-like wrinkles.

Interestingly though, extremely dark roasts can actually appear smoother again. I’m talking about beans roasted well past second crack — the kind that become visibly oily on the surface. At this stage, the bean structure has already been heavily damaged. The surface becomes brittle and porous under extreme heat, often developing a shiny oily coating. The original fine wrinkles get flattened or hidden beneath the oil, creating more of a cracked appearance instead of detailed wrinkles.

But this smoothness is really an illusion created by oils and surface brittleness — very different from the smoothness of a light roast.

Light-roasted beans have a dry, tight surface, almost like a fully stretched drum skin. Their cell structure remains mostly intact, with little to no oil leakage, giving them a matte and delicate smoothness. Deep dark roasts after second crack, on the other hand, develop shiny, reflective surfaces that almost look wax-coated. That oily layer fills in the tiny wrinkles and creates a glossy reflection that makes the beans appear smooth. But if you look closely, you can still spot tiny crack-like patterns — almost like a dried riverbed — rather than the continuous smooth surface seen in light roasts.

Bean density also plays a role. High-altitude hard beans, which are denser, tend to expand more evenly during roasting, so their wrinkles appear more organized and uniform. Lower-altitude softer beans are more likely to develop irregular wrinkles.

Processing methods affect appearance too. Washed coffees usually look cleaner, and their wrinkles appear much more obvious compared to natural-processed coffees.

That’s because washed coffees go through fermentation and water washing after the fruit skin is removed, fully cleaning away the mucilage layer before drying. The resulting green beans have very clean surfaces with only a thin layer of silverskin remaining. Most of that silverskin falls off during roasting, leaving the surface fully exposed. So when the bean collapses and wrinkles form, they appear sharp, direct, and highly visible. Sometimes washed beans almost look like they’ve suddenly “aged” after roasting, haha.

So if you’re trying to guess a coffee’s processing method by appearance, here’s a fun clue: if you see lots of silverskin and very visible wrinkles, there’s a good chance it’s a washed coffee.

Natural-processed coffees are different. In the natural process, the entire coffee cherry — including the skin, fruit, and mucilage — is dried together. During drying, sugars and sticky fruit compounds cling to the parchment layer surrounding the bean, forming a semi-transparent hardened “sugar coating.” During roasting, this layer caramelizes into a brown, crispy shell that still stays attached to the bean surface.

Even if the bean underneath collapses and wrinkles, this caramelized layer softens and masks those sharp edges. Instead of detailed grooves and wrinkles, you see a smoother, more even surface with a slightly textured appearance.

When we drink coffee every day — especially Ethiopian beans, which are often tiny to begin with — washed beans can honestly look pretty “ugly.” Many people assume smooth surfaces and even coloring mean better-looking, higher-quality beans, especially with naturals. But that’s also a kind of disguise. The heavily wrinkled washed beans are actually showing you the bean’s true cellular structure.

Appearance doesn’t equal quality. Sometimes, wrinkles are the most honest face a coffee bean can have, haha.

A Hidden Specialty Coffee Gem in Hangzhou | Endless Lamp Coffee Review

 Every year, quite a few new neighborhood cafés open in Hangzhou. As someone who’s constantly exploring new coffee spots, there are moments when I feel caught in the fleeting cycle of café-hopping and chasing the next “new thing.” Still, I always try to find something memorable — those subtle details that continue to shine through the ordinary. I suppose that’s become one of my deeper expectations for specialty coffee shops these days.

Today, I want to talk about a café called Endless Lamp Coffee, located at 22-1 Hefang Street in Shangcheng District, Hangzhou. It’s just a short walk from Jiangcheng Road subway station, and I happened to visit on its very first official day of business.

Before I even reached the shop, I could already see several customers gathered outside. Inside, there were opening flower arrangements sent by the owner’s friends. Even on day one, the café already carried a strong sense of community. Friends from all over had come together here, which says a lot about the owner’s personal charm. I can easily imagine this place becoming a warm neighborhood hub for nearby residents and office workers alike. To me, that community connection is the soul of a café, and the owner is often its best expression.

All of the beans served here are roasted in-house under the “Endless Lamp” label. Even during the soft opening, the coffee lineup was already impressively diverse, and sales seemed strong. The handwritten menu carried a warmth that digital displays simply can’t replicate. Holding the thick, textured paper instantly made the experience feel more personal and inviting.

The shop offers three espresso options alongside an even larger pour-over selection, with both categories receiving equal attention. Beyond the expected traditional espresso blend, there’s also a clean and straightforward Ethiopian washed SOE, as well as a more experimentally processed blend that immediately stands out from its flavor description alone. It’s clear that the bean selection was thoughtfully curated to appeal to different types of coffee drinkers.

For me, though, there wasn’t much hesitation — I naturally went with the Ethiopian washed SOE. Whether you prefer black coffee or milk-based drinks, beans like this rarely disappoint. I also liked how the menu simply categorized drinks as “black” or “white.” What made it even more interesting was the shop’s custom-designed cup size for milk drinks. Most cafés that use this menu style default to a standard latte ratio and volume, but Endless Lamp uses a cup that falls somewhere between an Australian flat white and a latte. That flexibility creates a very balanced milk coffee experience regardless of your preferred milk-to-coffee ratio.

The Ethiopian washed SOE worked beautifully as a milk drink. Visually alone, it was already incredibly pleasing. Honestly, cafés don’t always need heavy promotion. Sometimes, just posting a single photo of a beautiful milk coffee on social media is enough. Several friends immediately asked me where I got it. That alone says a lot about the quality of the presentation. Even through a screen, you could almost sense the silky texture and delicate microfoam.

Flavor-wise, it was wonderfully creamy, layered with citrus notes and hints of malt candy — a very classic Ethiopian profile overall, incredibly clean from start to finish. Coincidentally, the owner had just bought some fresh fruit and shared a small piece of pineapple with me. After finishing the milk coffee, taking a bite of sweet pineapple felt like a hidden post-credit scene at the end of a movie.

As I mentioned earlier, the pour-over selection here is equally impressive, and the pricing is remarkably approachable. Most of the beans lean toward traditional processing methods, and I was even surprised to spot a classic wet-hulled Mandheling on the menu — something I honestly haven’t seen in cafés for quite a while.

If I had to summarize my experience at Endless Lamp in one sentence, it would probably be: traditional coffee, unexpected surprises.

After some thought, I decided to order the cheapest pour-over on the menu — just 30 RMB. But affordable pricing should never make people underestimate flavor quality. In fact, when both quality and price align, it feels like a genuine win as a customer.

The coffee was an Ethiopian JERA Estate Washed 74110. I even looked up the green bean pricing online afterward: roughly 29 RMB for 200 grams, which works out to about 0.14 RMB per gram. But low green bean cost doesn’t automatically mean mediocre flavor. JERA Estate, located in Ethiopia’s Oromia coffee-growing region, benefits from an ideal microclimate and fertile environment for cultivating coffee trees. The farmers carefully harvest only ripe cherries and handle every processing step with great attention to detail.

Coffees from JERA Estate are known for their distinctive flavor profile: delicate white floral aromas, lingering sweetness across the palate, and an exceptionally soft mouthfeel. Those characteristics have become part of the estate’s signature identity.

Getting a pour-over for the price of a milk coffee already felt like incredible value. And despite being a very traditional washed coffee, the dry aroma was surprisingly sweet, filled with stone-fruit-like sweetness. The barista brewed it beautifully. From the very first sip, the acidity immediately came alive. The temperature control was spot-on, allowing the flavors to unfold with precision.

I have absolutely no resistance to coffees that open with vibrant acidity like this. It reminded me of a combination of lemon and citrus, with a slight astringency on the tongue that quickly transformed into intense salivation. Honestly… the flavor expression was fantastic.

What impressed me even more was how rounded and clean the entire cup felt. It’s exactly the kind of coffee you could keep drinking every day without ever getting tired of it. Truly excellent.

The Renaissance Behind La Marzocco: The Story of Florence’s Legendary Lion

 La Marzocco is probably one of the most recognizable espresso machine brands among coffee lovers. Many enthusiasts jokingly call it “La Ma” or “the Lion.” While most conversations about La Marzocco focus on its performance and its dominance in the commercial coffee industry, very few people talk about the true identity behind the lion in its logo. So today, let’s explore something a little different—the Renaissance hidden inside the world of espresso machines.

We all know that La Marzocco’s logo features a lion, a symbol that feels both mysterious and powerful. But it is far more than just a commercial emblem; it carries centuries of living history and cultural heritage. La Marzocco comes from Florence, the birthplace of the Renaissance and home to countless famous artists, architects, philosophers, and political figures. It is also one of the most iconic destinations travelers visit when they go to Italy. The city’s historic symbol is the “Marzocco,” which is the very name of the lion itself. To truly understand the La Marzocco brand, we may first need to begin with Renaissance-era Florence.

The name “Marzocco” is believed to originate from the Latin word “Mars,” the Roman god of war. Since Roman times, Florence had been regarded as a city under the protection of Mars, giving the lion strong associations with guardianship, victory, and strength. During the Middle Ages, lions were widely used as symbols of royalty and authority. The Republic of Florence chose the Marzocco lion to represent the supreme power of its people and their tradition of defending their homeland.

The version of the Marzocco lion most people recognize today largely comes from the famous sculpture created by Donatello, one of the greatest sculptors of the early Renaissance. His work marked the transition from medieval art into the new Renaissance era. Between 1418 and 1420, Donatello was commissioned by the Republic of Florence to create a stone lion sculpture in preparation for the visit of Pope Martin V. The statue was intended to decorate the staircase of the papal residence inside Santa Maria Novella. The lion stands in a solemn and commanding pose, with its right paw resting on a shield bearing Florence’s iconic lily emblem, eventually becoming one of the city’s most enduring symbols.

Today, the original sculpture is preserved in the Bargello National Museum, while the version displayed in Piazza della Signoria is a replica. Interestingly, Florence’s fascination with lions goes back even further. In the 14th century, the city reportedly kept more than thirty live lions on a single street, which eventually became known as “Lion Street.”

Fast forward to 1927, when brothers Giuseppe Bambi and Bruno Bambi founded their espresso machine company in Florence. They wanted a powerful symbol for their new brand, and ultimately chose the Marzocco lion, the symbol of their hometown. To them, the lion represented victory, conquest, resilience, and the determination to overcome challenges in the espresso machine industry. In many ways, they tied the destiny of the brand to the spirit and cultural legacy of Florence itself. Today, the La Marzocco lion is not only a tribute to the city’s glorious history, but also a symbol of the brand’s commitment to excellence, strength, and tradition.

If we look back at La Marzocco’s product design philosophy over the past few years, we can also see many subtle tributes to Florence and Tuscany. One design that left a strong impression on me was the limited-edition olive green La Marzocco Linea Mini released in 2021. Tuscany is often referred to as one of Italy’s most beautiful cultural regions, and Florence serves as its capital, famous for breathtaking landscapes and artistic heritage. When people think of Tuscany, they often picture olive groves and vineyards stretching across rolling hills. The color of this special Linea Mini was inspired by the olive fields surrounding Tuscany. Combined with gold accents and walnut wood customization, the machine carried a timeless vintage elegance.

But La Marzocco has never been a company that simply sells espresso machines. It has always been about building a culture people want to be part of. From 2000 to 2008, La Marzocco served as the official sponsor of the World Barista Championship, which further cemented its reputation in the specialty coffee industry. In recent years, as more coffee enthusiasts and espresso geeks have entered the scene, high-end home espresso machines have become increasingly popular among everyday consumers. Models like the La Marzocco Linea Mini and La Marzocco Linea Micra have allowed this legendary “lion” to step beyond cafés and into the coffee corners of ordinary homes.

A Hidden Coffee Gem on Hangzhou’s Famous Haier Lane | Inside Entrance Coffee Laboratory

 Mention “Haier Lane” in Hangzhou, and almost everyone will recognize it as one of the city’s most iconic coffee streets. Over the years, as people have come and gone and cafés have opened and closed, the coffee shops may change, but Haier Lane itself remains — along with its loyal crowd of coffee devotees. To be honest, my own feelings toward this street have changed quite a bit too. Many of the cafés that once felt like irreplaceable “white moonlight” memories have gradually disappeared, and when it comes to the newer wave of shops, it’s been hard for me to feel the same excitement again. Maybe because of that emotional baggage, I’ve found myself viewing many of the newer openings with a certain distance and skepticism, never quite stepping inside.

Not long ago, though, I noticed another new café had quietly opened on Haier Lane. Judging purely from the drinks and the bean selection, it immediately felt refreshing and different. At the very least, I sensed a level of professionalism that didn’t rely on the usual trendy, social-media-driven aesthetics this street has become known for. So for once, I decided to let go of my preconceived judgments and give both the café — and myself — a chance. The place is called Entrance Coffee Laboratory.

Apparently, the absence of a bold storefront sign has become its own kind of anti-mainstream attraction these days, and Entrance Coffee fits right into that category. I arrived by taxi and was greeted by a huge glass-fronted space: bright, spotless, minimal. In that moment, it felt as if the entire café itself was the signboard. It had been a long time since I’d seen such a classic island-bar layout — a large square coffee bar positioned in the center, with guests seated all around it, while the rest of the room was intentionally left open. It instantly communicated that coffee was the main character here, and conversation was part of the ritual. The openness and visual clarity of the space made it incredibly immersive from the very first second.

Then I looked at the menu.

Honestly, my internal reaction was: Who picked these beans? This lineup is absolutely insane.
And when I flipped to the pour-over menu, it became even more shocking.

Auction lots. Fresh harvests. Legendary growing regions. Traditional processing methods carefully preserved. Instantly, I could sense the philosophy behind their sourcing. Combined with the seating arrangement around the central bar, it created the feeling that every guest was somehow part of the café’s inner circle. It was almost as if Entrance Coffee was saying to everyone who walked in:

Don’t be a stranger. Come closer. Sit around the bar. Watch how we make coffee. Let’s talk about whether it tastes good together.

That’s confidence in coffee, but also trust in the customer.

Entrance Coffee updates its bean lineup every month or month and a half, which is honestly an impressive pace. But somehow, it also perfectly matches the identity of a place calling itself a “Laboratory.” Coffee beans are vessels for flavor perception, and constantly changing flavors are what create the spirit of experimentation. Of course, maintaining a rotation like this also says a lot about the café’s sourcing capabilities and access to green coffee resources. After all, not every café can convincingly call itself a laboratory.

Sometimes we assume the highlight of a café’s menu lies entirely in its pour-over offerings, but here, I honestly think no matter what you order — and no matter how many coffee origins you’ve already tasted — you’re likely to discover something new. And that, truly, feels like a rare kind of luck.

The first bean that caught my eye was a fresh harvest washed 74158 from Ethiopia Sidama called Masincho. Masincho is actually the name of a massive tree growing at the center of the Yaye washing station, and naming the coffee after it symbolizes the deep roots and foundation of the station itself. I ordered it as a hot Americano. Don’t ask why I can never resist Ethiopian Sidama coffees. Sometimes, when a profile becomes so familiar and approachable that it almost feels “everyday,” that’s exactly when you can quietly judge the true quality of a café’s green beans.

And honestly? This coffee completely surprised me.

The flavor was astonishingly delicate. Beyond the classic citrus notes, every sip carried hints of red florals, with bright, juicy fruit sweetness layered over an incredibly high sweetness level overall. Grown at 2300 meters above sea level, this coffee somehow tasted like it should have come from trees planted even higher up the mountain. Just one cup instantly made me feel like this café had set its baseline quality ridiculously high.

The extraction style for the Americano filtered out most of the crema, probably to avoid introducing bitterness or astringency. Personally, though, I still love Americanos with crema intact. Since this wasn’t an intentionally over-extracted profile, removing the oils also removed some body and roundness, leaving the flavors concentrated mostly in the front palate while the finish became comparatively lighter. Still, the barista mentioned the beans had only been roasted a few days earlier, which explained a lot. I could already imagine how much more refined it would taste once fully rested. Even so, the way those floral notes opened up the palate already felt incredibly elegant.

But the second coffee I tried was the moment I truly felt like I had “won” at this café.

A Colombian SL28 from the Origen Cooperative immediately grabbed my attention. Origen operates primarily in Tolima, Huila, Caldas, and Nariño — some of Colombia’s most legendary coffee-producing regions — partnering directly with farming families across these areas. One thing that makes Origen particularly impressive is its commitment to full traceability from farm to consumer. Knowing a coffee’s origin isn’t just about storytelling; it’s about guaranteeing authenticity and quality at every stage of the process.

At first, I simply thought: A classic washed Colombian from a cooperative I’ve never tried before? Sure, let’s see what it’s like.

Then the dry aroma completely short-circuited my brain.

Creamy strawberry. Tropical fruits. Gardenia blossoms. The fragrance was unbelievably intense.

I remember staring at the cup thinking: How is this washed coffee? Are you absolutely sure? And why is there basically zero silver skin left?

The barista immediately pulled out the importer’s information to show me. Later that night, I ended up deep-diving through the importer’s website at home. These days, so many Colombian coffees have become increasingly flashy and over-engineered, but seeing a producer applying advanced techniques with genuine restraint and integrity instead of gimmicks honestly made me admire them even more.

The reason this coffee develops such a unique dry aroma is because the cherries are first picked at peak ripeness, then floated and sorted before undergoing 24 hours of aerobic fermentation in sealed bags. After that, they’re soaked and fermented in sealed tanks for another 32 hours before being dried for 15 days and stabilized for 30 more days prior to milling.

In some ways, it almost resembles a semi-washed style. But regardless of the technical category, what impressed me most was how clean and transparent the complexity felt. I could tell immediately there were no “funky tricks” involved here. This coffee felt fundamentally different from the aggressively processed Colombians flooding the market right now. The idea that careful pre-fermentation alone could produce this kind of profile genuinely challenged my assumptions.

I chose this bean for a flat white.

At Entrance Coffee, you can actually choose your own cup, and one entire wall is dedicated to coffee cups. I pointed at a rounded cup with a narrowed rim and said, “This one. It’ll help with integration and latte art.”

The barista gave me a deeply approving look.

I laughed and said, “See? I get you.”

Because really, when the café cares this much about the experience, the customer naturally enjoys the experience even more.

The first sip of the flat white immediately gave me strong Ethiopian SOE vibes. The flavors weren’t quite as explosively aromatic as the dry fragrance had suggested, but the clarity was unbelievable — bright berry sweetness layered over an incredibly creamy texture. Honestly, I instantly regretted not ordering this bean as a hot Americano too. I probably would’ve been ecstatic.

This café. Seriously. Everyone needs to go.

At that point, I was fully prepared to forgive their expensive pricing. Honestly? Worth it.

I probably come across as the most extroverted person imaginable inside coffee shops. The barista himself was definitely more introverted, but once he realized I genuinely understood what we were talking about, he became incredibly open and willing to share everything. And I love that kind of transparency.

A café should be willing to openly discuss its sourcing and philosophy. That’s the right attitude for running a business built around consumer trust and perception, not some vague sense of self-satisfaction hidden behind secrecy. I genuinely admire cafés with an open-source mindset like this.

That confidence? That’s the real deal.