When grinding coffee beans, you'll often notice yellowish-white flecks mixed into the grounds—this is silver skin, the last protective layer of the green bean. How much of it remains depends mainly on how the coffee was processed, not on roasting technique. Natural-process beans shed their silver skin more completely, while washed beans, because the silver skin breaks into fragments, leave white lines in the bean's crease. Many people worry that silver skin will ruin the flavor. Through tasting silver skin steeped in water and comparative brewing experiments, Front Street found that silver skin itself carries a sweet corn- and wheat-like sweetness, and that coffee brewed without removing the silver skin tastes basically the same as coffee with it removed. This article will explain in detail where silver skin comes from, how it differs by processing method, and whether it truly affects coffee flavor. [more…]

In the coffee industry chain, silver skin is often overlooked as a roasting by-product. However, Japan's Ito En and Tully's Coffee have teamed up to transform this thin protective layer into water-resistant straws. Every 10 grams of coffee beans produces enough silver skin to make two straws, and it does not interfere with the flavor of the drink. In fact, Tully's Coffee had already launched eco-friendly napkins containing silver skin as early as 2012. Although these products are currently limited to some stores in Japan, silver skin-blended paper has already taken an eco-friendly step in reducing pulp usage. This article will guide you through the transformation of coffee silver skin from waste to practical accessories, and revisit coffee grounds recycling cases such as Starbucks' ground coffee straws, exploring the possibility of fully utilizing the entire coffee fruit. [more…]

When grinding coffee beans, you will often find yellowish-white flakes mixed in with the grounds—these are the silver skin of the coffee bean. The silver skin is the last natural layer wrapping the green bean before roasting, and how much of it remains varies by processing method: naturally processed beans shed their silver skin relatively completely, while washed beans tend to leave an obvious white line at the center of the bean. Many coffee lovers wonder: do these silver skin flakes interfere with the flavor of the coffee? The roasters at Front Street Coffee designed a set of experiments specifically for this, extracting silver skin by three methods—pour-over, tea bags, and espresso machine—to verify its actual impact through taste performance. This article will walk you through the structural characteristics of silver skin, the differences in how much remains under different processing methods, and the flavor conclusions drawn from the experiments. [more…]

Besides the bean inside the coffee cherry that can release thousands of aromatic compounds after roasting, the peeled fruit skin can actually also be brewed and drunk. In Europe and America it is called Cascara, while in China it is often called coffee cherry tea. This article begins with the tissue structure of the fruit skin, the materials removed during green bean processing, and the old uses of the skin as fertilizer or waste, then traces back to the story of Salvadoran estate owner Aida Batlle, who accidentally discovered its sweet aroma after sun-drying and tried brewing it, explaining that Cascara in Spanish simply means skin and husk. It then introduces the production process of the skin, from peeling, sun-drying, and manually removing impurities to 4–5 days of drying and color-change monitoring, analyzes the flavor characteristics of the skin tea, which is almost only sweet, and provides Front Street Coffee’s practical reference for hot brewing at 94°C water temperature, 20g of skin with 400ml of water, and a 1:20 ratio, as well as key points such as cold brew and specialty drinks, and caffeine being only one quarter that of coffee. [more…]

Many pour-over enthusiasts, after grinding coffee beans, feel uneasy when they notice silver skin remaining in the grounds—will these white flecks bring astringency and ruin a cup's cleanliness? Starting from the actual testing of Front Street Coffee's baristas, this article first clarifies the patterns of silver skin retention in different processing methods, then through brewing silver skin separately as well as comparative brewing with the silver skin removed versus retained, lets the flavor performance speak for itself, helping you judge the true impact of silver skin on coffee flavor, while also providing beginners with a practical reference approach for choosing pour-over single-origin black coffee beans. [more…]

Luckin Coffee has once again partnered with Tom and Jerry to launch a new product inspired by Inner Mongolian milk skin, the "Milk Skin Latte," attracting a large number of consumers eager to try it. However, feedback from the first batch of users has shown clear divisions: some find the milky pudding texture novel, while more people complain that the sediment in the cup is sticky and cannot blend with the coffee, with sweetness and bitterness distinctly separate on the palate, jokingly calling it "double-skin milk and latte each doing their own thing." Inner Mongolian netizens further pointed out that the coagulated substance used is not real milk skin, suggesting it be renamed "milk jelly latte." Luckin subsequently added a pudding-free version, but it was criticized as bland and unremarkable. What exactly is the root cause of this controversy over the taste of the Milk Skin Latte? [more…]

When buying coffee beans, the packaging often indicates processing methods such as natural, washed, and honey. What exactly is the difference between natural and washed? Front Street Coffee takes you through the structure of the coffee fruit to explain in detail the specific steps, advantages and disadvantages, and flavor characteristics of the two processing methods. It also uses two Yirgacheffe coffees—Front Street Natural Red Cherry and Washed Gudingding—to compare the silver skin differences between green beans and roasted beans, and to analyze the fermented sweetness of natural beans and the bright cleanliness of washed beans. Only by understanding processing methods can you better choose the flavor you love. [more…]

Coffee is a beverage many people can't do without in their daily lives, but there are also plenty of questions surrounding it: Does drinking coffee make your skin darker? Does coffee have any effect on the skin at all? And can it help with weight loss? This article will break down these common claims one by one. First, the melanin in your skin has nothing to do with the pigments in coffee—the idea that drinking coffee darkens your skin is a complete misconception. On the contrary, coffee can boost metabolism and activate the digestive organs, significantly helping to relieve constipation, and once constipation improves, rough skin improves along with it. In addition, about forty years ago, the female singer Yabe Lane tried coffee baths, which were said to be highly effective at eliminating excess fat all over the body, though there is no detailed record of exactly which components were responsible. Like sand baths, bathing with coffee powder is a thermotherapy that achieves weight-loss effects by making the whole body heat up and sweat. The article also includes related recommendations from Front Street Coffee for enthusiasts to refer to. [more…]

Yirgacheffe is the go-to starting point for many coffee enthusiasts, and the natural process gives it a completely different flavor direction. Starting from Front Street Coffee's natural Yirgacheffe, this article sorts through the drying process and flavor characteristics of the natural method, and compares it with the washed version, helping readers understand natural beans' fermented wine-like aroma, honeyed sweetness, and full body. The article also discusses the effect of silver skin on astringency, the correct understanding of coffee's acidity, and the significance of body and sweetness in tasting, finally offering advice on learning to taste starting with single-origin coffee. [more…]

Faced with a dazzling array of coffee beans, how can you quickly tell whether they are sun-dried or washed? In fact, as long as you grasp the basic processes of the two processing methods, and then combine them with the color of green beans, the silver skin of roasted beans, and the performance in the cup, you can easily distinguish them. The sun-dried method has a long history and relies on natural drying, so sugars easily seep into the bean surface; the washed method uses water tank screening and soaking to give coffee a cleaner tone. This article will start from the processing steps and compare one by one the differences between sun-dried and washed in green beans, roasted beans, and flavor, and use Front Street Yirgacheffe Sun-Dried Red Cherry and Washed Gudingding as examples to provide specific brewing comparisons, helping you quickly establish a basis for judgment in daily tasting. [more…]

Every coffee cherry is like a miniature flavor factory, with six layers—from the outermost skin to the seed buried deep within—each playing its own role. It is precisely the existence of these layers and the differences in how they are removed that determine the flavor directions of different processing methods such as natural, washed, and honey. The coffee tree belongs to the Rubiaceae family as an evergreen shrub or small tree, and its fruit is called a coffee cherry in the industry because its shape closely resembles a cherry. This time, we will not discuss the legend of the shepherd, nor repeat the classification of the three major varieties; instead, we will focus on the internal structure of the coffee cherry, disassembling one by one the six layers—exocarp, pulp, mucilage layer, endocarp, silver skin, and endosperm—to see how they work together to give coffee its ever-changing flavor expression. [more…]

Have you ever envied those experts who can tell a coffee bean's processing method at a glance? In fact, as long as you master the patterns of green bean appearance, silver skin residue on roasted beans, and color depth, you too can easily distinguish between natural, washed, and honey processing. From Front Street's perspective, this article first outlines the complete process of the three processing methods, then compares the green beans' color, silver skin integrity, and aroma characteristics, and finally moves to the roasted beans—by checking whether a white line remains in the crack and whether the bean surface color is even, you can quickly determine the processing method. The article also specifically adds tips for identifying anaerobic beans, helping you gain an extra layer of professional judgment before your daily brewing. [more…]

In the food service industry, it is already the norm for employees to wear masks at work. However, during the hot summer days, keeping one's mouth and nose covered under a mask for long periods inevitably causes discomfort. Recently, employees at Luckin Coffee stores noticed that the new masks distributed by headquarters differ noticeably from the old version—lighter in color and thinner in material, yet breathability does not seem to have improved as expected. After wearing them for a few days, many employees developed red bumps and itching on their chins and cheeks, and some suspect this batch of "veil masks" is the culprit behind their skin breakouts. Employees also reported that the new masks have an odor, and a few sensitive individuals experienced itching in the nose after putting them on. Everyone worries that these thin masks not only have questionable protective effectiveness but may also trigger allergies due to material issues. Some employees have already said they will buy their own masks as replacements. Although requiring masks is intended for food safety reasons, the skin problems reported this time may be worth Luckin re-examining the quality of its masks. [more…]

Many coffee enthusiasts can quickly determine a coffee bean's origin, variety, and processing method through observation and tasting. This is not an innate talent, but rather the mastery of certain practical techniques. Front Street Coffee has previously shared methods for identifying varieties with everyone, and this time will focus on how to distinguish coffee bean processing methods. The article unfolds from two angles: first, observing the amount of remaining silver skin, and second, distinguishing the flavor differences brought by different processing methods through tasting. Whether you are a coffee novice just starting out or an enthusiast hoping to further improve your tasting skills, these methods can help you more accurately understand the characteristics of processing methods such as natural, washed, and honey, so that you can make wiser choices when purchasing and brewing. [more…]

Yirgacheffe, as the top choice for specialty coffee beginners, is known for its bright acidity and clean flavor. From the perspective of Front Street Coffee, this article systematically reviews the geography of the Yirgacheffe producing region, the principles of washed and natural processing methods, and compares the specific differences between two beans—Front Street washed Gedingding and natural Red Cherry—in terms of green bean appearance, roasting, cupping, and brewed flavor. The article also includes detailed roasting curves and V60 brewing parameters for both beans, making it suitable for coffee enthusiasts who want to gain a deeper understanding of the flavor formation and brewing performance of Yirgacheffe. [more…]

Yirgacheffe is a coffee region that everyone is surely familiar with. Its bright acidity and clean, refreshing coffee flavor have made it the first specialty pour-over coffee bean for many people. In recent years, Yirgacheffe has sparked a revival of the natural (sun-dried) style. In many people's memories, Yirgacheffe has always been washed [more…]

Yirgacheffe, as an entry-level region for specialty coffee, features two distinct processing methods: washed and natural. Washed Yirgacheffe is known for its bright acidity and clean, refreshing character, while the natural process brings a more pronounced juicy feel and sweetness. Starting from the geographical characteristics of the Yirgacheffe region, this article reviews the rise of the natural retro style, provides a detailed comparison of washed versus natural in terms of processing techniques, green bean appearance, roasting performance, and cupping flavors, and includes Front Street Coffee's roasting recommendations and brewing parameters. Whether you prefer fresh acidity or rich fruity sweetness, you can find the right cup of Yirgacheffe for you. [more…]

The flavor of coffee beans depends not only on variety and origin—the processing method also plays a key role. This article systematically walks through the complete washed processing method—from removing floating beans and separating the skin and pulp, to fermenting away the mucilage, rinsing with clean water, and drying and hulling—and takes an in-depth look at the advantages and disadvantages of the washed method in terms of quality, appearance, cost, and water usage. At the same time, Front Street Coffee uses two washed beans—Kenya Asaliya and Yirgacheffe Gutingding—as examples to compare the flavor differences brought by different origins, altitudes, and varieties under the same processing method, helping readers build a more well-rounded understanding of washed coffee. [more…]

Have you ever wondered how the coffee you drink every day actually evolves from a tiny fruit? Although coffee is often likened to "juice," its production process is completely different from that of true fruit juice. This article will take you deep into the complete structure of the coffee fruit, analyzing the characteristics and roles of each part one by one, from the outer skin, pulp, and pectin layer to the parchment and silver skin. At the same time, we will also explore the geographical distribution of the Coffee Belt, the hardships of harvesting, and the processing and roasting process from green beans to roasted beans. Whether you are a coffee enthusiast just starting out or a seasoned taster, this article will unveil the mystery of the coffee fruit for you and give you a deeper understanding of the coffee in your cup. [more…]

Yirgacheffe is the top choice for countless pour-over enthusiasts just getting started, its bright, clean acidity standing in stark contrast to traditional coffee. But when faced with the two processing methods—washed and natural—how exactly should one choose? This article starts from two representative beans from Front Street Coffee—Natural Red Cherry and Washed Gutingding—and systematically sorts through Yirgacheffe's growing region background, the process differences between washed and natural, the appearance characteristics of green and roasted beans, and then moves on to roasting curves, cupping performance, and brewing suggestions, helping you understand the flavor directions brought by different processing methods and find the Yirgacheffe that best suits your own taste. [more…]