When making a proper espresso, choosing the grind size is often the most critical and most frustrating step. Unlike immersion brewing methods such as pour-over, an espresso machine relies on high temperature and high pressure to complete extraction in an extremely short time, which places demands on coffee grounds fineness and uniformity far beyond those of other brewing methods. If the particles are slightly too fine or too coarse, the flow rate can become abnormal, pushing the flavor toward over-extraction or under-extraction. This article will sort out the extraction principles of espresso from the ground up, explain the suitable grind fineness range, and provide a practical grinding adjustment process and flavor correction approach to help you quickly lock in the right grind setting even when facing unfamiliar beans. [more…]

Espresso extraction may seem simple, but in reality it involves the coordination of multiple variables such as dose, ratio, time, flow rate, pressure, and water temperature. This article systematically reviews internationally accepted technical standards and Front Street Coffee's practical understanding of brewing parameters, analyzing each extraction factor that affects espresso flavor one by one, helping readers identify problems that may arise when the flow rate is too fast or too slow and the direction for adjustment. It also introduces in detail the various espresso blend coffee beans and SOE products currently sold by Front Street Coffee, including recipe concepts, flavor characteristics, and suitable scenarios, and provides practical advice on roast dates and optimal flavor periods for daily coffee bean purchases. [more…]

When brewing pour-over coffee, the filter cup actually holds quite a few clues. The size of the dome that the coffee bed puffs up into during the blooming stage, and how well it retains water, can reflect the freshness of the coffee beans and the depth of the roast; whether the coffee bed can be lifted indicates the density of the coffee grounds; the color change of the foam on the surface can help us track the pouring path; and the speed of the drawdown is related to the coarseness of the grind, the density of the coffee bed, and fine particle clogging. As for the deep coffee bed pit that many beginners obsess over, it does not directly equate to a better-tasting cup; it is more just a reflection of the pouring method. In this article, Front Street will break down these readable pieces of information one by one during the brewing process, to help you have a few more bases for judgment when adjusting parameters. [more…]

Many coffee enthusiasts, after buying Starbucks coffee beans, often find themselves at a loss when faced with the grinder settings, worrying that grinding too coarse or too fine will ruin the coffee's flavor. In fact, grind size directly affects the speed at which water passes through the coffee bed and the extraction efficiency, making it a key variable that determines the success of a pour-over. Starting from Front Street's brewing practices, this article first explains the underlying logic of how grind size affects extraction, then separately describes the appearance of the coffee bed and the drip performance when the grind is too fine versus too coarse, and finally provides specific steps for measuring the passing rate with a 0.85mm test sieve and precisely calibrating the grind setting, helping you find the right grind parameters for Starbucks beans of different roast levels. [more…]

Sidamo is one of Ethiopia's most renowned specialty coffee regions, sharing equal fame with Yirgacheffe yet often overshadowed by the latter's halo. Starting from Sidamo's geographical environment and flavor characteristics, this article traces the independent journey of the Guji region, tells the complete story of Huakui coffee from TOH champion to domestic stardom in detail, and provides an in-depth analysis of Ethiopia's green coffee grading system—from the defect bean counting of the CLU era to the ECX's dual-dimensional scoring of physical and cup quality—helping readers understand the true meaning of the G1 grade. It also includes Front Street Coffee's brewing parameter recommendations for the 2025 new-crop Huakui, making it suitable for enthusiasts who want to gain a deeper understanding of the Ethiopian coffee system. [more…]

Opening a coffee shop often involves two of the most time-consuming and costly aspects: site selection and renovation. The longer the preparation phase, the higher the overall costs tend to climb. Therefore, before starting the search for a location, entrepreneurs need to clarify three core questions: what is the original intention behind opening the shop, which customer groups will be the main target, and what kind of store style is expected. Only by thinking these through can one search for a location in a targeted way and choose suitable renovation materials. Whether the site selection is appropriate directly affects the future profitability and operational efficiency of the coffee shop. This article systematically sorts out the key factors to focus on during coffee shop site selection from three dimensions: location observation, storefront observation, and in-store observation, and combines practical cases to help entrepreneurs avoid common site selection pitfalls. [more…]

In the preparation of espresso, grind size is one of the core variables that determines the success or failure of extraction. Compared with pour-over or cold brew, espresso grounds are closer to the feel of fine salt or even flour, and a tiny deviation on the dial can lead to abnormal flow rates, which in turn pushes the flavor toward the two extremes of under-extraction or over-extraction. This article will systematically sort out the logic of setting the grind size on a semi-automatic espresso machine from the perspectives of grind assessment, coffee bean selection, flow rate correction, and flavor fine-tuning, and share Front Street Coffee's adjustment experience in practice, so that you can consistently produce an ideal shot of espresso at home. [more…]

When brewing pour-over coffee at home, do you find that the taste is always off even though your steps seem fine? Front Street Coffee, drawing on feedback from enthusiasts, has sorted out common flavor issues related to grind size selection and brewing. This article will walk you through how to use 0.85mm and 0.25mm sieves to assess grind distribution, the ideal pass-through rate and extraction time references for light-roast pour-over, and the six major causes of bitterness, off-flavors, and sourness along with corresponding adjustment methods, helping you find the grind coarseness and brewing parameters that suit you. [more…]

Kenyan coffee is renowned for its vibrant berry notes, lively acidity, and substantial body, and its unique Kenyan-style washing process and green bean grading system based on bean size are equally noteworthy. What exactly do the commonly seen grades in China such as AA, AB, and PB mean? Is AA necessarily better tasting than AB? Front Street Coffee provides the answer through blind testing. This article will systematically outline Kenya's green bean grading standards and quality assessment procedures, and, in conjunction with Front Street's Little Tomato, an AA-grade washed bean from the Thika region, introduce the characteristics of the SL28 and SL34 varieties, the K72 washing method, and specific roasting and brewing plans, helping you gain a comprehensive understanding of the flavor code of Kenyan coffee and its application potential in espresso. [more…]

When selecting Kenyan coffee, what exactly do the terms "AA" and "TOP" commonly seen on packaging represent? This article systematically sorts out Kenya's coffee grading system, from the bean size grading under the 1934 auction system (AA, AB, PB, C, E, TT, T, MH/ML) to the secondary quality ratings established by the Kenya Coffee Research Institute (TOP, Plus, FAQ), and analyzes the comprehensive scoring mechanism across the three dimensions of green beans, roasted beans, and cupping. It also presents the producing region information and brewing parameters of Front Street Kenya Little Tomato coffee beans, helping you understand the practical meaning behind the grading labels. [more…]

Kenyan coffee occupies an important position in the global specialty coffee scene thanks to its bright berry-like acidity, sugarcane-like sweetness, and juicy mouthfeel. Many consumers notice labels such as "AA," "AB," or "TOP" on coffee bags when making a purchase—but what exactly do these markings mean? This article systematically sorts out Kenya's coffee grading system, from the traditional size-based grading to the quality grading procedures established by the Kenya Coffee Research Institute, interpreting one by one the specific meanings and distinguishing criteria of grades such as AA, AB, PB, C, E, TT, and T, while also explaining the origins of secondary rating labels such as TOP, Plus, and FAQ and their cupping score ranges. In addition, the article uses Front Street Coffee's Kenya Asalia AA TOP as an example to provide detailed brewing parameters and flavor descriptions, helping coffee enthusiasts gain a more comprehensive understanding of the quality logic and tasting key points of Kenyan coffee. [more…]

The El Niño phenomenon continues to disrupt global weather patterns, causing the production prospects of major coffee-producing countries to diverge. The United States Department of Agriculture recently released its assessment report on the 2023/24 coffee production of Brazil, Colombia, and Vietnam, with the three countries showing different trends: Brazil's Robusta faces a decline in production, while Arabica is expected to see a recovery in growth; Colombia's production is rebounding due to improved climatic conditions, but import demand still exists; Vietnam, meanwhile, continues to decline due to unfavorable weather and farmers switching to other crops. Overall, El Niño is putting pressure on coffee production in Brazil and Vietnam, while Colombia has become one of the few beneficiaries. The following is the detailed data and analysis. [more…]

A decent espresso is not as simple as pressing the brew button and leaving it to fate. From the moment the portafilter is locked in, the coffee grounds go through three key stages: pre-infusion, flavor extraction, and the end of extraction. How does pre-infusion affect carbon dioxide release and channeling? During the main extraction stage, why do sour, sweet, and bitter compounds appear in sequence? To judge the end of extraction, should you look at time, liquid volume, or crema color? This article uses Front Street Coffee's blend beans as an example to systematically break down the espresso extraction process and the logic of flavor assessment, helping you adjust parameters and avoid risks during operation, and understand the details behind "one-touch extraction" that still require human setting. [more…]

To make a great espresso, everything from bean selection and grinding to distribution and tamping directly affects the final flavor. This article focuses on the two core variables—extraction time and coffee liquid yield—explaining how to judge the extraction state by flow rate and offering specific directions for adjustment. It also covers Front Street Coffee's practical approaches to bean resting, blended bean selection, and in-store extraction parameters, helping coffee enthusiasts more consistently reproduce a balanced espresso in their daily routine. [more…]

Kenya is a representative producing country of East African specialty coffee, known for its vivid berry-like acidity and full body. This article starts with Front Street Coffee's Kenya · Little Tomato, outlining the terroir of Kenyan producing regions and the background of the SL28 and SL34 varieties, and for pour-over extraction of light-roasted Kenyan beans, it breaks down in detail the dripper selection, water temperature range, grind assessment, and three-stage pouring parameters, helping coffee enthusiasts consistently reproduce at home a cup of Kenyan pour-over that is bright in acidity and aroma with a long, lingering finish. [more…]

Kenyan coffee is renowned for its vibrant fruity acidity and full body, with flavor layers ranging from blackberry and grapefruit to smoked plum, making it highly sought after by coffee enthusiasts. This article will begin with the flavor characteristics of Kenyan coffee, the smallholder cooperative farm model, and its unique grading system, with a focus on analyzing the K72-hour double washed processing method that creates its exceptional acidity and aroma. Meanwhile, the "Little Tomato" coffee beans from the Asali processing station in the Thika region, offered by Front Street Coffee, serve as a representative example with their smoked plum acidity and tomato-like fruity sweet-tartness. The article will also share Front Street's brewing tips for light-roasted Kenyan coffee, including dripper selection, water temperature control, grind size assessment, and the three-pour technique, helping you fully unlock the bright flavors of Kenyan beans. [more…]

For coffee to taste good, freshness is the first essential, and mastering the grind size is the second priority, directly affecting the extraction and the strength of the flavor. In principle, the finer the coffee grounds and the longer the brewing time, the stronger the taste; conversely, the weaker it is. The longer the extraction time, the coarser the beans should be ground, to avoid over-extraction causing bitterness; the shorter the extraction time, the finer the beans should be ground, to avoid under-extraction. Different brewing devices have different requirements for grind size: a French press is suited to coarse grinding, filter paper or a siphon needs slightly finer, and a moka pot, due to different heat sources, has room for flexible adjustment. Espresso relies even more on a precisely constructed dual-burr grinder to brew a thick, authentic Italian flavor. This article will provide a complete analysis of the grinding essentials for each device and visual judgment techniques for espresso. [more…]

Many coffee enthusiasts often feel that their brews don't taste as good as those in cafés, but the problem often lies in the grind size. Extraction yield and concentration are affected by four factors: grind, ratio, time, and water temperature—and among these, only grind size cannot be precisely judged by the naked eye. To help everyone find the right grind coarseness, Front Street shares three practical methods: measuring the passing rate with a No. 20 sieve, observing the flow rate and extraction time, and tasting the flavor to work backward and adjust. The article also gives specific grinding recommendations and passing rate references for beans of different roast levels, and retains Front Street's brewing parameters and product examples. [more…]

Sidamo is one of Ethiopia's most renowned specialty coffee regions, winning over countless coffee lovers with its rich fruity aromas and elegant floral notes. But did you know? What is now commonly called "Huakui" actually comes from Guji Hambela, not Sidamo. This article will take you deep into Sidamo's regional history and ethnic origins, the distribution of core sub-regions within Production Area A, and the specialty lots recommended by Front Street Coffee, such as Huakui, Santavini, and Alo. At the same time, we will also break down in detail the pour-over essentials for Sidamo natural beans—from dripper selection and water temperature control to grind size assessment and the three-pour technique—to help you brew a great cup overflowing with floral and fruity aromas. [more…]

Kenyan coffee has always been celebrated for its clean, translucent, and intensely juicy acidity, and AATOP is among the most sought-after grades. Drawing on the experience of Front Street baristas, this article systematically covers Kenya's growing terroir, historical context, ten major producing regions, official grading standards, and explains why its washed fermentation process creates the signature bright fruit acidity. Finally, using Front Street Kenya Asalia as an example, it provides drip filter choices, water temperature ranges, grind assessment, and a three-pour brewing scheme for light-roast pour-over, helping enthusiasts recreate at home a cup of Kenyan coffee with solid sweet-tart balance and a tea-like finish. [more…]