Many coffee enthusiasts notice a phenomenon when buying Ethiopian heirloom coffee beans: the bean sizes are uneven. The reason behind this is not accidental, but closely related to Ethiopia's unique coffee cultivation system. As the birthplace of coffee, Ethiopia has thousands of unidentified coffee varieties, which the government protects under the name "Heirloom." However, the real key to uneven bean size lies in its diverse cultivation models—plantation coffee, forest coffee, semi-forest coffee, and garden coffee coexist, plus the mixing of multiple varieties during harvesting and processing, ultimately forming the "natural grand mix" that we see. This article will break down these stages one by one, taking you deeper into the root causes of uneven Ethiopian heirloom beans. [more…]

Coffee enthusiasts often notice that the coffee beans they buy vary in color from light to dark, and suspect a roasting problem. In fact, in most cases the color variation is not a roasting accident—it may actually mean the beans can brew into a richer, more layered cup. As an agricultural product, coffee beans can never be as uniform as an industrial product. This article starts from the common questions received by Front Street Coffee's customer service to explain how factors such as the uneven size of Ethiopian beans, residual pectin sugars in honey processing, and anaerobic processing cause color variation in coffee beans—and why this variation is sometimes a plus for flavor. [more…]

As the birthplace of coffee, Ethiopia often produces coffee beans of varying sizes, a phenomenon closely tied to its unique variety system and cultivation methods. On Front Street Coffee's bean list, the Ethiopian region boasts the richest selection, and we frequently receive feedback about uneven bean sizes. This article explores the reasons behind the size differences in Ethiopian coffee beans, analyzes the overall characteristics of Ethiopian coffee, and explains what heirloom and native varieties are, helping coffee enthusiasts gain a more comprehensive understanding of this region's unique charm. [more…]

Ethiopia, as the birthplace of Arabica coffee, is known for beans with floral and citrus notes, but many enthusiasts notice that the coffee beans here often vary in size and shape. This is not a quality issue, but rather the result of the country's extraordinarily rich variety of coffee cultivars, diverse cultivation patterns, and a grading system that focuses on defect rate rather than bean size. This article will analyze the causes of differences in Ethiopian coffee bean morphology, introduce the three cultivation methods of garden, estate, and forest, explain the JARC digital variety series and the origin of 74158, and finally present the flavor profile of Front Street Coffee's Sidamo Santawini coffee beans. [more…]

Many coffee enthusiasts notice a phenomenon when they first encounter coffee beans from African origins: Ethiopian beans are generally more uneven in size than Kenyan beans, with noticeably lower uniformity. Whether it is Yirgacheffe or Sidamo, washed or natural, it is common to see obvious differences in bean size and roast color within the same batch. Behind this phenomenon lie both the genetic diversity of Ethiopia's nearly two thousand coffee varieties and its unique cultivation patterns and centralized processing methods. This article will systematically sort out the variety classification and cultivation system of Ethiopian coffee, and introduce the three primary processing methods of natural, washed, and semi-washed, helping readers fully understand the root causes of the morphological differences in African beans. [more…]

Although more and more people are paying attention to single-origin coffee nowadays, judging from the ordering situation at Front Street Coffee, espresso-based drinks still account for a large proportion. This is merely a matter of taste preference, and it does not mean that espresso is better than single-origin coffee, or that people who drink espresso do not [more…]

Latte coffee may seem simple, but in reality, every step—from bean selection, extraction, to milk frothing and latte art—hides its own intricacies. While the ratio of milk to coffee, the beans used, and parameters vary across cafes, the classic approach typically involves a generous amount of milk blended with espresso. This article uses Front Street Coffee as an example to systematically explain the entire latte-making process: how to choose Italian-style coffee beans based on flavor preferences, adjust grind size, dose and distribute the grounds and tamp, as well as the principles and techniques of steaming milk, and finally, latte art practice steps for beginners. Whether you're preparing for a barista interview or looking to improve your output at home, you'll find practical references here. [more…]

Many coffee enthusiasts are in the habit of tapping the dripper during pour-over to level the coffee bed, believing this promotes more even extraction. But you may not know that frequent or forceful tapping can actually trigger the "Brazil nut effect," causing fine particles to sink to the bottom and coarse particles to float up, leading to two negative outcomes: first, during blooming, hot water struggles to evenly saturate all the coffee grounds, and the fine particles at the bottom stay dry, resulting in under-extraction; second, the fine particles clog the pores of the filter paper, prolonging the extraction time and causing over-extraction. Through repeated testing, Front Street Coffee has found that when using a conical dripper and denser coffee grounds, digging into the bed after multiple taps often reveals dry clumps at the bottom. So how should an uneven coffee bed be handled? And what should you watch out for when tapping? This article will break it down for you in detail. [more…]

Blooming is a key step in pour-over coffee that allows the coffee grounds to degas and expand, but sometimes we see bubbles continuously rising from the surface of the coffee bed, or even deep craters left behind. This phenomenon is often related to clumping of fines and uneven pouring, and may trigger channeling, leading to uneven extraction. This article will analyze in detail the causes of bubbling during blooming, the specific impact of channeling on extraction, and the differences between pour-over and espresso in this regard. At the same time, we will also share two practical tips—spraying water before grinding to remove static, and using a distribution needle to break up the coffee bed before brewing—to help everyone reduce the occurrence of channeling and improve brewing consistency. If you also pursue more even extraction, read on. [more…]

When making espresso, you set the parameters correctly yet end up with a cup of sharp, thin coffee—and after knocking out the puck, you find a small hole in it. Behind this puzzling phenomenon, it is actually "channeling" at work. This article will walk you through what channeling is, why it occurs, and how to avoid extraction sputtering and uneven extraction through bean selection, resting, dose control, and proper distribution and tamping. It will also recommend two espresso recipes—Front Street Classic Blend and Front Street Strawberry Candy Espresso—to help you make stable, delicious espresso at home. [more…]

Every coffee shop has slight differences in the milk-to-coffee ratio, beans used, and extraction parameters for their lattes. But in general, a latte is a coffee drink made by mixing a large amount of milk into espresso. Many friends have messaged Front Street Coffee (FrontStreet Coffee) asking. [more…]

Ethiopia, as the genetic repository of Arabica, has a truly unique coffee bean grading system. Because there are so many varieties, most growing wild or semi-wild, coffee farmers often process them in mixed batches at harvest, making it difficult to grade by size. As a result, the Ethiopian government chose to use defect rate as the primary criterion. After the new ECX system was implemented in 2009, cupping scores were also incorporated into the rating system, finally giving natural-process beans a chance to rank among G1 and G2. So, for washed Yirgacheffe of the same origin, just how big is the difference between G1 and G2? Front Street Coffee takes Kochere G1 and a washed Yirgacheffe everyday drinking bean G2 as examples, comparing green bean appearance, defect rate, and cupping flavor to give you a closer look. [more…]

Nowadays, more and more people are paying attention to single-origin coffee, but in terms of orders at FrontStreet Coffee, espresso-based drinks still account for a larger proportion. When it comes to choosing espresso beans, what FrontStreet Coffee focuses on is [more…]

Latte is one of the most familiar espresso drinks among coffee enthusiasts in China, and the combination of espresso and milk gives it a smooth, sweet, and easy-to-drink taste. But to make a qualified latte, every step matters, from bean selection, grind adjustment, dosing, distribution, and tamping, to steaming milk and pouring latte art. This article uses the latte commonly seen in barista interviews as an entry point to systematically sort out the extraction parameters of Front Street Coffee's classic espresso blend, milk steaming temperature and thickness, and cup selection, and explains in detail the importance of even dosing, methods for checking distribution, tamping direction, as well as steam wand angle and the push-heart technique for beginner latte art, helping readers master the entire process and key points for consistently producing a standard latte. [more…]

Why are coffee beans from Ethiopia's Yirgacheffe region so uneven in size? What is the story behind the local native Heirloom varieties? From the perspective of Front Street Coffee, this article systematically sorts out Ethiopian coffee variety classification, the causes of Yirgacheffe's signature flavors, and the ECX grading system, and uses Front Street washed Gedeb cooperative coffee beans as an example to explain in detail the four key brewing points—water temperature, grind size, coffee-to-water ratio, and pouring technique—to help you brew a cup of Yirgacheffe with white floral aromas and bright citrus sweetness. [more…]

Latte is one of the most frequently ordered espresso drinks in cafés, yet its origins, recipe ratios, and preparation details are often richer than one might imagine. This article begins with the Blue Bottle coffeehouse in Vienna in 1683, sorts out the differences between latte and café au lait, explains in detail the standard method for making an espresso latte, extraction parameters, dosing and tamping techniques, and milk frothing skills, and introduces how Front Street Coffee's classic espresso blend performs in actual service. Whether you are an enthusiast wanting to learn about latte culture or a professional practicing the fundamentals of being a barista, you will find useful reference here. [more…]

Front Street has noticed that many coffee novices or baristas believe the key skills in making espresso-based coffee are milk frothing and latte art, but Front Street believes the most important thing in espresso-based coffee is the extraction of the espresso shot. If the espresso doesn't taste good, no matter how smooth and velvety the milk foam is or how beautiful the latte art looks, the milk coffee won't taste good either. [more…]

Yirgacheffe, as a representative of Ethiopian specialty coffee, has a grading system that directly affects flavor expression and quality consistency. Ethiopian coffee beans are divided into five grades based on standards such as defect rate, with G1 being the highest level. However, Ethiopian beans appear uneven due to their wide variety of cultivars, with long beans and short beans mixed together, especially in Grade 4 or Grade 5 commercial beans. This article provides a detailed analysis of Yirgacheffe's grading system and an in-depth discussion of Ethiopian coffee beans' appearance characteristics, flavor advantages, and roasting challenges, while also comparing the differences between washed and natural processing to help coffee enthusiasts gain a more comprehensive understanding of this legendary region. The various Yirgacheffe G1 products recommended by Front Street Coffee are ideal choices for experiencing its citrus floral aroma and sweet-tart flavor. [more…]

When using a bottomless portafilter to extract espresso, you may occasionally encounter a situation where the coffee liquid does not fall vertically but instead sprays out from the filter basket. This phenomenon is known in the coffee community as channeling. Although it does not necessarily make the coffee taste bad, it significantly increases the probability of uneven extraction, making it more likely to produce a cup that is both sharply sour and bitter. In this article, Front Street Coffee systematically sorts out the formation principles of channeling and summarizes five operational steps that easily trigger channeling: uneven distribution of coffee grounds, uneven tamping pressure, knocking or bumping when locking the portafilter into place, too little coffee dose or too coarse a grind, and too many clumps of coffee powder. For each situation, Front Street Coffee also provides specific improvement suggestions to help everyone reduce the probability of channeling occurring in daily extraction. [more…]

Friends who frequently use a moka pot have probably encountered the situation where the coffee flow suddenly turns from a thin stream into two violent jets of water—this is commonly known as the "double ponytail" phenomenon. Its appearance often means there was an operational error during the extraction process, ranging from making the coffee taste bitter and uneven to potentially posing a safety hazard. This article, from the perspective of Front Street, begins by outlining the pressure-extraction principle of the moka pot, then analyzes one by one the four key factors—adding too much water, coffee grounds being too coarse, uneven distribution of grounds, and excessive heat—along with corresponding adjustment suggestions. It will also share directions for choosing coffee beans suitable for moka pots, helping everyone consistently make a rich, well-balanced espresso at home. [more…]