When evaluating a cup of coffee, cleanliness is a frequently mentioned yet easily misunderstood indicator. Many people assume that cleanliness is equivalent to being light or highly acidic, but in reality there is no necessary connection between the two. A coffee with high cleanliness means the liquid contains no off-flavors, and the taste is pure and distinct, rather than bland and tasteless. This article will focus on the definition of cleanliness, common misconceptions, and specific methods for improving cleanliness during pour-over brewing. At the same time, drawing on Front Street Coffee's brewing experience, it will help readers build a correct understanding of coffee flavor cleanliness and apply it in their daily pour-over practice. [more…]

In the evaluation system of specialty coffee, cleanliness is a core indicator that cannot be overlooked, yet many coffee enthusiasts have misunderstandings about it. Some believe that cleanliness means a single flavor profile, while others equate it with the clarity of the coffee liquid. In fact, cleanliness is closely tied to coffee quality—it requires both the absence of negative defect flavors and the presence of forward flavors that are sufficiently clear and distinguishable. Front Street Coffee will start from cupping standards to systematically sort out the two-layer evaluation logic of cleanliness, helping everyone re-understand this key concept in specialty coffee evaluation and understand why it can directly reflect the overall quality level of coffee. [more…]

When drinking coffee, people often exclaim, "This bean is so clean," but many can't clearly explain what cleanliness actually means. It really refers to the coffee's main flavors being clear and transparent, with no off-flavors or defects. Cleanliness is influenced by multiple factors including cultivation, processing, roasting, and brewing. Is washed coffee necessarily cleaner than natural coffee? Does bright acidity equal cleanliness? As ordinary consumers, what brewing details can we use to improve a cup of coffee's cleanliness? From Front Street's perspective, this article systematically sorts out the definition of cleanliness, common misunderstandings, and two practical tips—bean resting and gentle pouring—to help you taste and brew coffee more professionally. [more…]

When drinking coffee, we often hear the term "cleanliness" — what exactly does it represent? Simply put, cleanliness is the degree of purity perceived by the tongue — from the first sip to the aftertaste, there are no off-flavors or unpleasant mouthfeel, and the flavors are clearly distinguishable. A cup of coffee with high cleanliness often has prominent floral and fruity notes and sugary sweetness, while flavors like earthiness, woodiness, and rubber are rejected by most people. Many factors affect cleanliness, including the quality of the coffee beans themselves, the proportion of defective beans, the processing and roasting stages, and the brewing method. This article, from Front Street Coffee's perspective, explains the meaning of cleanliness and offers practical advice on selecting and brewing pour-over coffee beans with a bright taste. [more…]

Cleanliness is an important dimension in judging coffee quality. It reflects whether a cup of coffee carries negative flavors such as earthiness, hay, or woodiness, or unpleasant sensations like astringency and dryness. From harvesting and processing to roasting and brewing, every stage can influence the level of cleanliness. This article starts with the emphasis COE cupping places on cleanliness, traces the historical problems Brazil—the world's largest coffee-producing country—has faced due to machine harvesting and rough sun-drying, and then extends to the impact of the roasting and brewing stages on cleanliness, helping coffee lovers systematically understand the industry chain logic behind a clean cup of coffee, while also retaining relevant recommendations for the Front Street brand. [more…]

In coffee tasting, "cleanliness" does not refer to whether the coffee liquid looks clear, nor does it mean a single, bland flavor profile. Rather, it means that upon tasting, there are no unpleasant defective flavors, while at the same time the various flavors are clearly distinct and do not interfere with one another. This metric may seem simple, but in reality it places high demands on every stage of coffee—from cultivation, processing, roasting, and brewing. This article will systematically sort out the meaning of cleanliness, analyze how defective flavors and off-flavors are formed, explain the key impact of brewing and extraction on cleanliness, and finally provide brewing suggestions for two Front Street Coffee beans with high cleanliness. [more…]

When tasting pour-over coffee, clarity is often mentioned, but what exactly does it mean? Which steps can influence the clarity of a cup of coffee? From the perspective of Front Street, this article sorts out the relationship between clarity and the overall flavor performance of a cup of coffee, explaining that clarity is not an isolated indicator, but needs to be judged together with layering, aroma fullness, and aftertaste. It will also mention store information for Front Street Coffee, helping readers more accurately understand the meaning of clarity and the factors that influence it in pour-over practice. [more…]

Tasting a cup of coffee is not just about drinking it. From whether the acidity is pleasant on entry, to whether sweetness can be perceived, to the body and smoothness brought by mouthfeel, as well as the performance of cleanliness and aftertaste, every dimension affects our overall evaluation of the cup. This article will guide you through the five core elements of coffee tasting one by one, helping you build a more systematic tasting framework and understand what kind of coffee can truly be called "good." At the same time, the article also incorporates the tasting experience of Front Street Coffee, providing practical reference ideas for coffee lovers. [more…]

Cold brew acts like a magnifying glass for coffee beans: the sweet becomes sweeter, and the astringent becomes even more astringent, so the cleanliness of the beans is crucial. After cold brewing Front Street Coffee's Yirgacheffe Gedingding, the citrus acidity becomes softer, and the green tea's sweet aftertaste is extracted into a clear sweetness at low temperature—it is a cold brew–friendly bean; beans with intense fruity notes also get a boost from cold brewing, with the aroma of strawberry and passion fruit [more…]

Whether a cup of coffee can be crowned with the name "specialty" is by no means decided by cupping alone. From the origin of the green beans, screening and processing, to roasting and brewing, every stage requires careful control, so that the flavor in the cup ultimately presented can reflect the characteristics and cultural heritage of the producing country. This article will systematically sort out the two major cupping scoring systems, COE and SCA, and break down one by one the points to note for each scoring element, including cleanliness, sweetness, acidity, body, flavor, aftertaste, and balance, as well as explain in detail the defect scoring rules and grading standards. Front Street will also draw on years of quality control experience to help you use evaluation grades as a reliable reference for judging specialty coffee when purchasing coffee. [more…]

When making espresso-based Americano, some people are in the habit of placing a filter paper at the bottom of the portafilter basket—what changes does this actually bring? Starting from a comparative experiment at Front Street, this article analyzes the specific effects of filter paper on coffee cleanliness, aroma, body, and flavor layering. Filter paper can intercept the fine particles in espresso, making the Americano taste cleaner, but it may also weaken the aroma and solid mouthfeel brought by lipids. Through a comparison of two cups of Strawberry Candy Espresso Americano, the article demonstrates the significant difference between using and not using filter paper, and explains why other espresso drinks such as lattes usually do not adopt this practice. Ultimately, the choice depends on whether you want a clean, light Americano or a coffee with a solid, richly layered flavor. [more…]

Indonesian Sumatra Mandheling coffee has always been known for its full body and herbal aroma, but many enthusiasts find that ordinary Mandheling often falls short in terms of cleanliness. Front Street Coffee's PWN Golden Mandheling, however, is highly popular for being almost acidity-free, high in cleanliness, full-bodied, and carrying herbal spice notes. This article will analyze in detail the fundamental reasons for the difference in flavor cleanliness between Golden Mandheling and ordinary Mandheling from perspectives including Indonesian coffee-producing regions, the terroir conditions of Mount Gayo in Aceh, PWN company's quality control system, and wet-hulling processing. At the same time, Front Street Coffee will also share green bean analysis, roasting suggestions, cupping reports, and brewing insights for this bean, helping you gain a comprehensive understanding of this deeply beloved coffee. [more…]

To enjoy a cup of pour-over coffee with a fresh flavor and clean mouthfeel, there are actually discernible guidelines when choosing beans. The degree of roast, the processing method, and the terroir of the growing region are the three key factors that determine the direction of a coffee's flavor. A light roast preserves more organic acids and delicate aromas, while the washed process makes the fermentation level of the coffee beans more controllable, and the regions of Africa and Central and South America are especially concentrated sources of fresh-flavored beans. Based on Front Street's bean-selection experience, this article lays out a practical approach to choosing coffee beans with high cleanliness and a fresh flavor, and recommends specific qualifying beans such as Front Street Yirgacheffe·Gedeb and Front Street Wander Estate·Washed Geisha, suitable for both pour-over and cold brew preparation. [more…]

"Liquor color" is originally a professional term in tea evaluation, used to describe the color and visual characteristics of brewed tea, and is also one of the criteria for judging tea quality. So for coffee, can liquor color also serve as a basis for evaluating quality? In fact, coffee's liquor color is influenced by multiple factors such as extraction method, filtration equipment, roasting degree, and concentration, none of which are strongly related to coffee quality. Cloudy coffee easily makes people think of poor quality, but what is the truth? Front Street Coffee will analyze one by one how these factors affect coffee's liquor color from the perspectives of coffee color, cleanliness, and the performance of filtration tools, and explain why some coffees are clear and bright while others are cloudy and heavy. [more…]

For pour-over Yirgacheffe, the standard is flavor layering and clarity: washed Gedeb, with its citrus florals and green tea sweetness, unfolds layer by layer through the pour-over filter paper; sun-dried Huakui has a richer fruit aroma—when brewed as pour-over, the strawberry sweetness arrives first, followed by the passion fruit acidity—pour-over brings out Yirgacheffe's layering [more…]

Coffee processing methods directly affect the final flavor expression, and natural, semi-natural (pulped natural), and honey processing are three common but easily confused methods. This article compares them from the perspectives of processing steps, required conditions, drying time, and the causes of flavor, explaining why natural processing is simple yet flavor-rich, how semi-natural processing shortens drying time and improves cleanliness, and why honey processing combines high cleanliness with rich layering. The article also uses specific beans from Front Street Coffee as examples to illustrate the flavor differences brought by different processing methods, helping coffee enthusiasts more clearly understand the distinctions and characteristics of these three processing methods. [more…]

When you first start buying beans, rather than chasing breadth of flavor, it's better to first dig deep into a single bean: choose one with a clear flavor profile and high brewing compatibility, lock in the dose, grind, and water temperature, then observe the details of the entry, sweetness, and finish—this is how a flavor reference is established. Pour-over flavor comes from origin, variety, processing method, and roast level. [more…]

Front Street Coffee has previously introduced the concave-designed conical Ice Pupil dripper, and today we bring its younger sibling—the Ice Pupil B75. This flat-bottom dripper, co-designed by Li Jinlong and Timemore in 2022, gets its name from the Basket and its 75° angle. It features a 5cm extra-large drainage hole and a thick-walled heat-retaining structure, bringing the coffee bed closer to a cylindrical shape, allowing for smooth and even drainage. Front Street conducted both hot and iced brewing tests using Ethiopian 74158 Santa Vini and Emerald Green Label Geisha: during hot brewing, the B75 maintained a stable flow rate throughout, completing extraction in 2 minutes and 9 seconds, with prominent notes of dried mango, strawberry, and black tea, and an extremely strong sweetness; during iced brewing, it presented a balanced juice-like quality of honey, cream, and mandarin orange. The B75 is also very friendly to beginners who are not skilled at flow control, making it a powerful tool for amplifying the strengths of sweet beans. [more…]

After extracting espresso, the golden, dense foam on the surface is the Crema. Sometimes this layer of crema develops brown streaks of varying shades, resembling tiger stripes, which enthusiasts call "tiger-striped espresso." How exactly do these patterns form? Does it mean the coffee tastes better? Front Street Coffee will start from the composition of the crema, analyze the origin of the tiger stripes, and compare the respective advantages of tiger-striped espresso and regular espresso in terms of body and cleanliness, helping coffee lovers view this phenomenon more rationally. [more…]

The same cup of coffee—some people taste plum acidity and whisky aroma, while others find it merely sweet and easy to drink. So who ultimately decides these flavor differences? The quality assessment of specialty coffee relies on a team of professionally trained and certified Q graders, who follow a globally standardized procedure to score each item one by one, including dry fragrance, wet aroma, flavor, aftertaste, acidity, body, uniformity, balance, cleanliness, and sweetness. This article breaks down the complete cupping procedure in detail, from grind size, coffee-to-water ratio, and water temperature to breaking the crust, skimming, and slurping, and explains the specific meaning of scores from 6 to 10 in the SCAA scoring standards, helping coffee enthusiasts understand the reference value and limitations of cupping scores and find the coffee flavors that truly suit them. [more…]