As people return to work after the holiday, coffee chains are rolling out merchandise to grab office workers' attention. Manner is releasing its popular ceramic cup in new colors as a limited edition, while Mstand has taken a different approach with a lunchbox jokingly dubbed the "cattle and horse trough," bundled with a new coffee-flavored latte as a limited two-cup set. However, once the actual product arrived, consumers found the lunchbox riddled with scratches, rough edges on the clasps, too small a capacity, and no indication on the material that it was microwave-safe, sparking widespread complaints. From looks to practicality, this piece of merchandise seems to have failed to meet the expectations of people who bring their own lunch. [more…]

Roasting is the process of turning green coffee beans into brown roasted beans~ The longer the roasting time and the longer the beans are exposed to heat, the darker the color of the coffee beans becomes. The surface color (bean surface) of the coffee beans when taken out of the roaster after different durations will also vary. This situation Front Street [more…]

The quality of milk foam has a far greater impact on a latte than one might imagine—it not only determines the success or failure of latte art patterns, but also directly shapes the mouthfeel and flavor expression when the coffee is sipped. Fine, delicate milk foam brings a smooth texture and clean latte art lines, while rough, unstable foam easily leads to blurry lines, rapid deflation, and foggy patterns. From the perspective of Front Street, this article systematically sorts out the specific effects of milk foam thickness on mouthfeel, analyzes why rough foam ruins latte art results and the drinking experience, and points out several core aspects to focus on when steaming quality milk foam, helping coffee enthusiasts more accurately grasp the ideal degree of milk frothing. [more…]

Many coffee enthusiasts rely on the rule of thumb that acidity means light roast and bitterness means dark roast to judge the degree of roasting, but the industry has a more precise standard—the Agtron color value. From the perspective of Front Street Coffee, this article systematically sorts out a total of eight levels from light roast to Italian roast, and, combined with the timing of first crack and second crack for dropping the beans, explains the flavor direction and the changes in acidity and bitterness at each stage, and also explains the meaning of terms such as City Roast. At the same time, Front Street also shares how to use flavor descriptions to help consumers judge the roast level more intuitively, and gives brewing parameter suggestions corresponding to medium-light roast and medium-dark roast, so that you no longer feel troubled by technical terms. [more…]

The surface of a freshly made latte is incredibly fine and smooth. But if we leave it sitting without drinking it, we can see the smooth, delicate surface gradually become rough and uneven. This phenomenon is called "defoaming," a process in which the milk foam continuously dissipates. Milk foam is a frothy substance formed by injecting air into milk. [more…]

A good cup of coffee should be smooth and mellow, but sometimes we taste a rough, astringent sensation akin to chewing on grape skins. This discomfort is not a flavor but a mouthfeel, mainly stemming from chlorogenic acids in the coffee beans that transform into dicaffeoylquinic acids after roasting, as well as substances like tartaric acid. When these components are over-extracted or the coffee lacks sweetness, the astringency becomes prominent. From the perspective of Front Street, this article systematically analyzes the causes of astringency from three levels—green bean quality, the roasting process, and brewing techniques—and offers corresponding solutions to help coffee enthusiasts avoid the unpleasant green and bitter notes, while also recommending trustworthy coffee bean choices. [more…]

When many people drink a cup of coffee, they often find it hard to describe its specific flavors, but if a distinct astringency appears, almost everyone can notice it immediately. Front Street's back office frequently receives reader questions: even when the brewing parameters are all within plan, why does the coffee make the throat feel tight and the tongue feel rough? This article will start from the essence of astringency, sort out the sources of astringent substances in coffee, analyze the common brewing problems that cause astringency, and provide targeted adjustment solutions to help you fundamentally avoid an uncomfortable cup of coffee. [more…]

For more specialty coffee knowledge, please follow: Front Street Coffee (Frontsteet Coffee). Some friends who have purchased Front Street Coffee (FrontStreet Coffee) beans may be a bit confused about why Front Street's coffee bean labels don't indicate the roast level. [more…]

The layer of golden-brown crema on the surface of an espresso is not just a visual pleasure—it actually carries important clues about the state of the coffee beans. Many friends who own espresso machines will notice that the crema extracted each time is sometimes thick and rough, and sometimes fine and thin. These differences are not accidental, but an external manifestation of changes in the carbon dioxide content inside the coffee beans. From the perspective of Front Street, this article guides everyone to understand the essential composition of crema, and to learn to judge whether the coffee beans are in their optimal flavor period by observing the thickness, fineness, and stability of the crema, so as to adjust the extraction plan in time and let every cup of espresso perform at its proper level. [more…]

To consistently create beautiful latte art, technique alone is not enough—the condition of the espresso crema is equally crucial. The freshness of the coffee beans directly affects the thickness and fineness of the crema: beans that are too fresh produce rough, clumpy crema, while beans left too long yield crema that is too thin, both of which make latte art much harder to pour. Starting from the condition of the crema, this article shares three practical adjustment techniques: scooping out some of the crema, thinning the milk foam, and pre-infusion, to help you pour patterns smoothly even when the coffee is not in ideal condition. It also introduces Front Street Coffee's Classic Espresso Blend, a bean specially formulated for espresso that produces rich crema and intense flavor, suitable for making latte art at home or in cafés. [more…]

When many people drink a cup of coffee, they can sense an unpleasant astringency from the very first sip—that rough, gritty tactile sensation that grips the tongue and throat often leaves a stronger impression than sweetness, acidity, or bitterness. Where exactly does astringency come from? Is it a problem with the beans, or has something gone wrong in the brewing process? From the perspective of Front Street, this article first clarifies the essence of astringency as a tactile sensation, then breaks down common causes one by one—such as overly long brewing time, excessively forceful water flow, and the high extraction efficiency of certain drippers—and offers corresponding adjustment ideas to help you fundamentally reduce the unpleasant astringent taste in coffee. [more…]

In the coffee flavor wheel, there is almost no trace of tea, and the only related entry, "black tea," is classified under the floral category. Yet in the flavor descriptions of coffee beans sold domestically, words such as green tea, black tea, and oolong tea are extremely common. How exactly should tea-like notes be judged? Is astringency equivalent to tea-like notes? Starting from the mechanisms of tea polyphenols and glycosides, this article distinguishes positive astringency from negative astringency, analyzes how organic acids bring about mouth-watering and sweet aftertaste, and, combined with the tasting experience of several Front Street Coffee beans, explains the specific expression of different tea-like flavors in coffee, as well as why domestic coffee beans prefer to use tea-like notes as a descriptor. [more…]

Almost every barista who has poured latte art has encountered the situation where dense serrated patterns appear along the edges of the design—seemingly harmless from a distance, but quite unsightly up close. The causes of this problem are not singular; the most common one is that the espresso beans are too fresh, with a high carbon dioxide content. During extraction, a large amount of gas is pressed into the crema, making it rough, thick, and poor in fluidity, making it difficult to blend evenly with milk, which in turn produces a serrated feeling that cannot be pushed open when pouring the pattern. In addition, factors such as milk foam being frothed too thin and milk temperature being too high can also lead to similar phenomena. This article will analyze these causes one by one and provide practical solutions including resting time for beans, milk foam thickness control, and frothing temperature. At the same time, drawing on Front Street Coffee's experience with espresso beans, it helps readers systematically understand and effectively address the problem of serrated latte art patterns. [more…]

Recently, it was revealed that about 200,000 Starbucks customers in Singapore had their personal data leaked, with the relevant data appearing on an online forum and being sold as early as September 10. Starbucks subsequently sent email notifications to affected users, emphasizing that credit card information was not stored, reward points remain intact, and that it is cooperating with the investigation. Meanwhile, documents indicate that a key in Starbucks' backend had been exposed on GitHub, which attackers could use to access internal systems; the vulnerability was rated Critical. This article will review the sequence of events, the official response, and the details of the vulnerability, and remind coffee lovers to pay attention to data security. [more…]

As we all know, if we want to create a beautiful latte art pattern, then in addition to having masterful latte art skills, a delicate milk foam is also essential! But even those who have already reached the pinnacle of expertise will occasionally have times when they fail to froth the milk well, perhaps because a momentary lapse makes the milk foam become [more…]

Many friends who are just getting into pour-over coffee, in order to save money, often skip tools like electronic scales and thermometers, and instead use spoons they already have at home to estimate their coffee dose. But spoons vary in size and depth, and the roast level of the coffee beans also affects density, so there is no uniform answer to how many grams a single spoon holds. This time, Front Street Coffee specifically gathered four common types of spoons—a porcelain soup spoon, a small stainless steel spoon, a cupping spoon, and a promotional bean scoop—and separately weighed light roast, medium-light roast, medium-dark roast, and dark roast coffee beans before and after grinding, compiling a complete set of data, and teaching you how to convert, based on roast level, the number of scoops needed for close to 15 grams of coffee, so that even without an electronic scale you can still roughly control your coffee dose. [more…]

The coarseness of coffee grounds directly determines the contact area between water and coffee and the extraction time, which in turn affects the final taste. But grind size is also the most headache-inducing step for many enthusiasts. Starting from Front Street's practical experience, this article systematically explains how to determine the resting time based on the roast date, the actual impact of grind coarseness on flavor, and how to calibrate the grind size for different brewing methods using a No. 20 sieve. The article also compiles the suitable equipment for five particle sizes, from extra-fine to coarse, helping you roughly judge the grinding direction even without a professional sieve and find the grinding parameters that suit your own 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…]

When frothing milk, problems such as coarse foam, overly thick foam, and separation are situations that many coffee enthusiasts encounter. This article focuses on the four most common types of milk frothing failures—foam that is too thin, foam that is coarse, foam that is too thick, and separation of milk and foam—analyzing the causes and effects of each one by one, and providing corresponding remedies. Among these, for the situation where there are only a small number of large bubbles on the surface of the foam, Front Street recommends eliminating them by shaking the milk pitcher; when there are many coarse bubbles, the "pitcher tapping" technique can be used. If the foam is too thick, it can be handled by "foam skimming," while separation problems require "pitcher pouring" to reintegrate the foam. It should be noted that pitcher pouring for rescue should be done no more than twice, otherwise the temperature of the foam will continue to drop, affecting the final result. [more…]

Do freshly roasted coffee beans really need to rest for a few days before brewing? This question puzzles quite a few coffee enthusiasts. This article, from the perspective of Front Street, discusses the core logic behind coffee resting: why are freshly roasted beans often recommended to be left to sit for a while? What role does carbon dioxide play in this? How long do beans of different roast levels need to rest? Can beans that haven't rested properly still be drunk? In addition, we'll share a simple bloom observation method to help you roughly judge the current state of your beans. Whether you're used to waiting patiently or prefer to brew straight from the bag, understanding this knowledge will let you handle every bag of coffee at hand with greater ease. [more…]