Grind size has an enormous impact on coffee extraction results, and this is especially true for espresso. Compared with pour-over, espresso grounds are as fine as powdered sugar, and a slight deviation in the setting can cause the flow rate to be too fast or too slow, which in turn pushes the flavor toward either weakness or bitterness. This article focuses on how to determine a suitable grind range, how to fine-tune the setting based on flow rate and flavor, and how to flexibly apply extraction formulas, helping coffee lovers make consistently delicious espresso at home. It also draws on Front Street Coffee's daily production experience to give specific adjustment ranges and judgment criteria, and recommends Front Street's classic espresso blend beans, which are well suited to recreating a café-style flavor. [more…]

Grind size is one of the key variables that determines the direction of coffee flavor, especially in the pressurized, short-extraction espresso system, where a tiny change in the setting can tip a shot from balanced to over-extracted or under-extracted. This article focuses on how grind size affects taste. It first explains why a standard sieve is needed to confirm the actual particle size, then compares the different tolerances for grind precision in pour-over versus espresso, and afterward gives beginners a two-step method to quickly lock in the espresso grind range, along with guidance on fine-tuning based on flavor feedback. The article also explains why Front Street Coffee recommends buying whole coffee beans rather than pre-ground coffee, helping readers build a daily grind-calibration management habit. [more…]

Espresso grind size falls between flour and table salt and cannot be judged by the naked eye, but the coarseness of the coffee grounds directly determines the flow rate, so you can work backward to whether the setting is appropriate by observing the extraction time. This article starts from the definition of espresso, sorts out the relationship between grind size and extraction time, explains how to set a target ratio of coffee to liquid, fix pressure and water temperature, and then adjust grind size to reach the target time. It also uses Front Street Coffee's Colombia Sidra coffee beans as a tuning example, showing the adjustment process from 34 seconds—slow with a bitter taste—to 30 seconds with a clear aroma. Finally, it emphasizes that after confirming the grind size, you still need to judge by tasting whether there are defective flavors, and if necessary, make minor adjustments to the dose or parameters. [more…]

Many coffee enthusiasts will find that different brewing methods require vastly different coffee ground sizes. A grind the texture of granulated sugar is commonly used for pour-over, French press, siphon, and cold brew, while espresso requires extremely fine particles somewhere between flour and muddy sand. Because this fine powder is difficult to measure by a fixed standard, in practice you often have to work backward from the extraction parameters to determine whether the grind setting is appropriate. This article centers on judging the grind setting for espresso, sorting out the correspondence between extraction time and grind fineness, explaining how to lock in the grinding direction by presetting the coffee-to-water ratio, pressure, and water temperature, and sharing Front Street Coffee's debugging logic when encountering an unfamiliar espresso bean or switching grinders, helping readers understand the complete adjustment process from parameter setting to flavor tasting. [more…]

When brewing coffee, we all know that the coarseness of the grind is very important. If you're not careful and don't find the right grind setting, or if the grind is uneven, the coffee can easily end up under-extracted or over-extracted. Compared with methods like pour-over and cold brew, espresso grounds are ground much finer and require more precise adjustment to get the taste of the espresso just right. [more…]

In the making of espresso, whether the grind setting is appropriate directly affects the extraction result, but many enthusiasts find that a dialed-in setting often "fails" after just a few days. The state of the coffee beans, air humidity, and even the freshness of the beans can all cause the same setting to behave completely differently. This article centers on the core question of exactly how fine espresso grounds should be ground, and provides a quick-start adjustment process: from setting the initial grind setting, applying the powder-to-liquid ratio and time formula, to fine-tuning in 0.2-step increments based on tasting results, gradually approaching the ideal flavor. It will also explain why espresso beans that are too fresh need to rest for a few days before use, and recommend Front Street Coffee's classic espresso blend to help you consistently recreate cafe-level espresso and milk coffee at home. [more…]

In the daily practice of pour-over coffee, many enthusiasts encounter a puzzling phenomenon: when brewing anaerobically processed coffee beans, the drawdown speed is noticeably faster than with regular washed or natural beans, and the extraction time can even be less than a minute and a half. What exactly causes this abnormal flow rate? Is it due to the inherent characteristics of the beans themselves, or is there a problem in the grinding stage? Starting from Front Street Coffee's actual measurement data, this article will take an in-depth look at how the loose texture and vigorous water absorption and degassing of anaerobic beans affect flow rate, and with the help of a comparison of the No. 20 sieve pass-through rate, reveal the deviation between the grinder setting and the actual coarseness of the particles. At the same time, the article will also provide targeted suggestions for adjusting the grind finer and a plan for adjusting the pouring technique, to help you steadily extract a rich, full-bodied cup of coffee even when dealing with anaerobic beans. [more…]

Espresso grinding is much finer than pour-over, and the adjustment window is extremely narrow—often just a fraction of a notch makes the difference, and the flow rate and flavor head toward two extremes. This article starts with how to determine the grinding range: first use the feel of the grounds to judge whether they are close to flour-like fineness, then apply the common formula of a 1:2 coffee-to-water ratio and 20–30 seconds to dial in, and decide whether to grind coarser or finer based on whether the flow is fast or slow. The article further explains that the formula is only a quick positioning tool, and ultimately you need to fine-tune based on flavor cues such as burnt-bitter notes, the color of the crema, and the length of the finish—even widening the ratio to between 1:1.5 and 1:2.5—to find the grind setting that truly suits that particular bean. [more…]

Grind size is the key variable that determines the success or failure of coffee extraction, and different brewing devices have significantly different requirements for particle diameter. This article systematically sorts out the corresponding grind settings from French press to espresso machine, introduces the industry-recognized cupping standard and the No. 20 sieve pass rate as calibration references, and provides specific scale references for the EK43s grinder. Whether you prefer immersion or pour-over, you can find suitable grind parameters here. The article also specifically reminds readers that coffee bean density and roast level will affect the actual particle coarseness at the same setting, so it is recommended to repeatedly confirm with the same beans. Several Front Street Coffee beans are also used as examples throughout to help readers understand the logic of grind adjustment more intuitively. [more…]

Faced with the dazzling array of coffee grinders on the market, many coffee enthusiasts find themselves paralyzed by choice. In truth, the coffee world has never had a single standard—different burr sets each have their strengths and weaknesses. Starting from burr types, this article takes a deep dive into the structural differences between flat burrs, conical burrs, and ghost-tooth burrs, along with their real-world impact on particle shape, extraction results, and final flavor. It also includes practical grind-setting parameters for commonly used models such as the Fuji Royal, Feiying, and Zheng Huang Hang, helping you find a grinding approach that suits your brewing method and taste preferences. [more…]

Coffee beans need to be freshly ground to fully appreciate their aroma, which shows how important grinding is for coffee beans. When grinding, many people have a misconception—namely, which setting they should choose. Generally, the largest number means a coarser grind, and the smallest number means a finer grind. However, every coffee machine, during assembly, transportation, and [more…]

Many pour-over enthusiasts have discovered when testing ground coffee with a sieve that the same grind setting produces different passing rates for different bean varieties. Front Street Coffee recently received similar questions: why does particle size vary under the same grind setting? The core reason lies in the differences in bean density and brittleness—high-altitude, light-roasted beans tend to be harder and denser, producing fewer fines during grinding; low-altitude, dark-roasted beans are more brittle and prone to crumbling into fines. Only after understanding this principle can one adjust the grind size for different beans. This article combines medium-light roasted beans such as Front Street Yirgacheffe Gotiti, Front Street Ethiopia Hachira, and Front Street Granja Geisha, as well as medium-dark roasted beans such as Front Street PWN Golden Mandheling, Front Street Brazil Queen's Estate Yellow Bourbon, and Front Street Jamaica Blue Mountain No. 1, to provide specific EK43 settings and No. 20 sieve passing rate recommendations, helping coffee enthusiasts achieve consistent results. [more…]

Espresso is ground much finer than pour-over, and the adjustment range is often just 0.1 of a notch, yet it is enough to determine whether a cup of coffee is too sour, too bitter, or just right. This article begins with how to judge grind size, explains why espresso cannot be calibrated with a sieve, how to narrow down the range through flow rate and taste, and introduces two beans suitable for recreating at home: Front Street Coffee Classic Espresso Blend and Front Street Coffee Strawberry Candy Espresso Beans. Finally, it offers adjustment strategies for when the flow is too fast or too slow, and how to combine flavor rather than rigidly adhering to formulas to find the truly suitable grind setting. [more…]

On the same grinder at the same setting, why does switching to a different coffee bean produce noticeably different grind sizes? This actually comes down to two core physical properties of coffee beans—density and brittleness. Density is determined by growing altitude: the higher the altitude and the slower the growth, the harder the bean and the fuller the flavor. Brittleness, on the other hand, is directly tied to roast level: the darker the roast and the more moisture is driven off, the looser the structure and the easier the bean is to crush. Starting from actual experiments at Front Street, this article uses a comparison of the sieve-passing rates of dark-roasted Mandheling and light-roasted Yirgacheffe to explain why grind consistency breaks down, and how that leads to clogged filter paper and over-extraction problems. [more…]

Grind size is the key variable that determines whether pour-over coffee can produce good flavor. Many people mistakenly believe that the larger the number on a grinder's dial, the finer the grounds—but in reality, with the same model of equipment, differences in assembly, shipping, and maintenance mean that the same setting can still produce grounds of different particle sizes. Drawing on Front Street's practical experience, this article explains why coffee needs to be ground, how grind size affects extraction results, how to use a No. 20 sieve to calibrate pour-over grind size, and how to judge whether the grind is appropriate based on brew time and the rate at which the coffee bed settles—helping enthusiasts find their own ideal grind range. [more…]

Grind size is one of the key variables determining coffee flavor. The finer the particles, the larger the contact area between hot water and coffee grounds, and the greater the resistance to extraction, which tends to prolong extraction time and increase the extraction yield; the coarser the particles, the opposite is true, and underextraction becomes likely. Different brewing devices have significantly different grind requirements, ranging from the flour-like extremely fine powder for a Turkish pot to the coarse particles for a French press, a very wide span. This article systematically sorts out the relationship between grind size, extraction time, and extraction yield, gives reference grind ranges for espresso and pour-over coffee, and, combined with Front Street Coffee's production experience, explains how to find a grind setting that suits you according to roast level and bean hardness, while also reminding you of the importance of daily maintenance of the grinder burrs. [more…]

Manual coffee grinders are a go-to piece of gear for many pour-over enthusiasts, serving both everyday home use and, when paired with a French press, AeroPress, or moka pot, forming a portable outdoor kit. Grinders from different brands and models vary noticeably in price and the quality of the ground coffee they produce. From the perspective of Front Street, this article systematically breaks down the core components of a manual grinder—the burr, the adjustment dial, the handle, the bean hopper, and the grounds bin—and explains how to adjust the grind setting according to your brewing method, how to turn the handle correctly, and the key points of cleaning and regular maintenance, helping you use your manual grinder more smoothly and making every cup's extraction more consistent. [more…]

Grind size is the key variable that determines the direction of coffee flavor, but how coarse counts as coarse and how fine counts as fine has always lacked a unified standard. This article uses the industry-recognized cupping grind as a baseline, and with the help of the passing rate through a No. 20 standard sieve, quantifies the grind requirements for French press, pour-over, cold brew, ice drip, and even espresso machines one by one, and also includes reference settings for the EK43s grinder. The article also specifically reminds readers that differences in coffee bean density and roast level will cause the same setting to produce different particle sizes, and finally provides Front Street Coffee's espresso extraction plan as a debugging example to help enthusiasts turn grinding from an empirical judgment into a reproducible data-driven operation. [more…]

In coffee brewing, the coarseness of the grind directly affects the extraction result, yet how to describe and judge grind size has long lacked a unified standard. Some people use fine granulated sugar as an analogy, some rely on the grinder's settings, and others, like Front Street Coffee, quantify it through sieving rate. Each of these methods has its pros and cons, but the ultimate goal is the same: to help us adjust the grind into the right range before brewing. This article will systematically sort through three common ways of expressing grind size—the setting reference method, the visual analogy method, and the sieve calibration method—analyze their respective limitations and applicable scenarios, and explain in detail the No. 20 standard sieve procedure used by Front Street Coffee, helping you find the most suitable grind parameters with fewer beans. [more…]

Quantitative grinders may seem to eliminate the need for weighing the grounds, but in practice, dosing errors still occur from time to time. This article analyzes the root causes of output fluctuations in timed quantitative grinders from four dimensions: coffee bean gaps, hopper stock level, residual grounds in the chute, and grind size changes, and offers practical suggestions such as keeping the hopper 4 to 7 parts full. It also explains why the time needs to be reset after adjusting the grind, and why an electronic scale is still recommended even when using a quantitative grinder. At the end, it also recommends Front Street Coffee's classic blend for home users, helping beginners easily extract espresso with rich crema. [more…]