Pu’er Coffee

 When it comes to coffee extraction—whether it's espresso or pour-over—there’s one thing you simply can’t avoid: the filter paper . This small sheet of paper has quietly evolved over the past few years alongside the technological development of specialty coffee. In fact, its evolution has been so dramatic that the word “crazy” might not be an exaggeration. This “craziness” includes innovations in materials, upgrades in functionality, and of course, some pretty crazy price tags as well—haha. Today, I’d like to talk about why filter papers in coffee extraction keep evolving. What exactly are people pursuing when they aim for the ultimate cup of coffee? And what role can filter paper play in shaping the final result? Let’s dive into the “crazy evolution” of coffee filter papers. Different filter papers vary in density, thickness, structure, and permeability , and these factors directly determine the flow rate . Flow rate, in turn, affects coffee extraction, flavor, and mouthfeel. ...

 Many coffee lovers enjoy milk-based coffee drinks. Not only do they offer visually pleasing latte art that delivers a strong emotional appeal, but they also provide a smooth and approachable coffee taste. This combination is one of the main reasons why milk coffee is so popular. However, did you know that the temperature of milk directly affects the sweetness, texture, and flavor balance of coffee? Even small temperature changes of just a few degrees can significantly alter sensory perception. Different types of milk require specific temperature ranges to avoid negatively affecting flavor and mouthfeel. If you regularly make milk coffee at home, you probably know that when steaming milk, one of the most important skills is learning how to create smooth microfoam while controlling the temperature properly. Doing so enhances the milk’s natural sweetness and improves the overall drinking experience. Milk is essentially a mixture of water, fats, and proteins. When milk is over-steam...

 Just recently, while attending a coffee tasting event—what we often call a “coffee cupping banquet”—I happened to hear the term “Golden Honey Process.” Most of us are already familiar with names like White Honey, Yellow Honey, Red Honey, and Black Honey when it comes to coffee processing methods. But what exactly is Golden Honey? For a moment, it made me reflect on how new terminology constantly appears in certain industries today. These new terms often make people both curious and cautious. Are they the result of genuine technological innovation, or simply clever marketing? It struck me that this phenomenon is actually worth discussing within the specialty coffee world. So today, I’d like to share some of my observations and thoughts—and of course, feel free to join the conversation in the comments. The charm of specialty coffee lies in its spirit of innovation and continuous learning . To some extent, the appearance of new professional terms and vocabulary in the industry i...

 “Coffee Tasting Banquet” is a kind of tasting experience created for coffee enthusiasts. For coffee shops, this format allows them to test market reactions and collect customer feedback through a sharing-based event. The concept itself provides an excellent setting for both tasting and discussion. At this particular event, they brought six outstanding beans from different origins. Taking advantage of this tasting session, I’d like to share some thoughts about these six coffee regions and the flavor characteristics of their beans. The first bean comes from Roble Estate in Colombia . The farm reaches elevations of up to 1,800 meters and is located in the town of Pitalito in Huila. The owner, Dionel, named this coffee sanctuary after a century-old oak tree that inspired him. The estate places great emphasis on precision throughout the processing stage. After handpicking, the cherries undergo flotation to remove defects, followed by a second manual sorting to eliminate unripe fruit. ...

 When you’re out visiting cafés, have you noticed that many of them now prefer using zhukou cups for milk-based drinks? They’re especially popular for flat whites. Whether in terms of volume or latte art control, zhukou cups just seem to work beautifully. As a result, the term “zhukou cup” has quickly become a hot search keyword in online shopping. Simply put, the defining characteristics of a zhukou cup are that it’s short, sturdy, and compact. The walls usually go straight up or taper slightly inward at the rim. Most are made of ceramic with relatively thick walls. Visually, they look squat and charming—almost like a small barrel. The walls are nearly vertical, the base is wide, and the opening is generous. These are cups you naturally cradle in your hands, and they’re essentially designed as professional vessels for showcasing milk drinks with latte art. So why is this shape such a perfect match for milk coffee? Let’s break it down. If you’re currently debating which cup to u...

 I’ve talked before about “coffee on airplanes,” and anyone who’s been on a long-haul flight knows the feeling—at some point, you just want a decent cup of coffee to stay awake. Unfortunately, what you usually get onboard is instant coffee, to the point where most people have completely given up hope. For a long time, I assumed this was simply airlines trying to cut costs, or maybe a result of limited cabin space that made it impossible to install proper coffee machines. Either way, I never felt I had a truly convincing explanation. Carrying that bias with me, I eventually started digging into the topic. After looking into the details, I finally found some solid reasons that answered a question I’d wondered about for years. So today, let’s talk about why it’s basically impossible to brew fresh coffee with a coffee machine on an airplane. I’m sure many people share this professional—or at least emotional—curiosity. The idea of sipping a freshly brewed coffee at 35,000 feet sounds i...

 You bought beans with a great reputation — so why does your coffee taste off when you brew it at home? Don’t blame the beans first. Most likely the problem is in the brewing steps. Drip-bag coffee looks simple — just pour boiling water, right? There’s a lot more to it. Those drips that come out creamy and smooth with bright fruit or nutty notes weren’t made by chance. Here are four of the most common brewing mistakes, each with practical fixes. Follow them and your next drip-bag brew will taste noticeably better. Mistake 1: Judging water temperature by feel? Boiling water kills the flavor Pouring boiling water straight onto the grounds is a common habit. You might think hotter water brings out more flavor, but the result is often bitter, burnt-tasting coffee that feels harsh on the throat. That’s not the beans’ fault — the high temperature is extracting the “bad” compounds. There are two key groups of compounds in coffee grounds: one group contains the aromatic and fruity/aci...