Chain coffee brands each have their own memorable selling points, and Tims China (Tims天好咖啡) has gained popularity with its bagels and Fresh Brew coffee. Fresh Brew coffee is similar to drip pour-over, with less oil and a refreshing taste, favored by many enthusiasts. But recently, some netizens reported that the Fresh Brew coffee they bought at Tims had a large amount of coffee grounds left at the bottom of the cup when they finished drinking it, and customer service responded that "sediment is a normal phenomenon," sparking controversy. Similar complaints are not the first of their kind; as early as last November, consumers had already posted photos complaining about it. A small amount of fine powder sediment in coffee is common, but the amount of grounds visible to the naked eye has already affected the drinking experience. Is it a staff operational error or an equipment malfunction? Will Tims take measures to standardize its products? This article takes you through the whole story. [more…]

Many coffee enthusiasts, while enjoying an espresso, notice black particles settling at the bottom of the cup and worry whether this means something went wrong with the extraction. In fact, in most cases this phenomenon is perfectly normal. These sediments are extremely fine coffee grounds that have passed through the holes of the portafilter basket, and they usually sink to the bottom gradually after the coffee has rested for a few minutes. This article will explain in detail the principle behind how these fines appear, their relationship with tiger-striped crema, and several factors that may cause a sudden increase in sediment, including grinding too fine and deformation of the basket's mesh. At the same time, Front Street Coffee will also use examples to help you determine when you need to adjust your grinding parameters, so you can face that layer of fine grounds at the bottom of your cup with greater ease. [more…]

Many people notice a layer of fine black powder at the bottom of the cup after finishing a latte or espresso, and sometimes dark particles float at the bottom of an iced latte as well. Is this actually normal? Does it affect flavor or health? In fact, this sediment consists of ultra-fine particles that pass through the filter basket holes during espresso extraction. A trace amount is normal, but if a large amount of grounds is visible to the naked eye, it means something has gone wrong in the extraction process. This article starts with where these fine particles come from, analyzes possible factors such as grinding, the portafilter basket, and barista technique, and offers practical solutions like adjusting the grind setting, switching baskets, and adding a paper filter, to help you enjoy a cleaner cup of coffee. [more…]

As the weather heats up, Luckin Coffee's cold brew has returned to the market, becoming a refreshing choice for many consumers. However, recently several customers have reported that after finishing their cold brew, they found a thick layer of coffee grounds settled at the bottom of the cup, with a noticeably powdery mouthfeel, some even describing it as "like drinking muddy soup." This phenomenon has drawn attention from cold brew enthusiasts, and Luckin employees have revealed that the problem may lie with the filter bags used for filtration. What exactly is going on? And how should the brand address it? This article breaks down the ins and outs of the incident. [more…]

Cold brew coffee, with its refreshing and smooth taste brought about by low-temperature extraction, has become increasingly popular among coffee enthusiasts in recent years. All you need is coffee grounds, cold water, an airtight container, and a refrigerator to make it easily at home. However, many people find in practice that their homemade cold brew is never as rich and sweet as what they get at coffee shops, and sometimes it even turns out cloudy with sediment. Drawing on Front Street's practical experience, this article systematically sorts through the bean selection approach, steeping time, coffee bean freshness, stirring technique, and filtration key points for cold brew coffee, helping you identify where the problem lies and make a cup of cold brew coffee with full flavor and a clear texture. [more…]

Many people, after drinking an Americano or espresso, notice some fine black particles settling at the bottom of the cup—are these actually coffee grounds? And why are they rarely seen in iced drinks? Drawing on Front Street Coffee's practical experience in production, this article explains the sources of very fine particles in espresso extraction, including grinding particle size, the mesh of the portafilter basket, and cleaning of the group head, and offers four actionable improvement measures. The article also records the results of Front Street's test of placing a circular filter paper in the portafilter basket—although it effectively intercepts fine particles, the extraction flow rate and flavor change, requiring readjustment of the grind and dose parameters. [more…]

The French press has always been known for being simple to use and requiring no paper filter. Its metal mesh filter retains the coffee oils, giving the brew a fuller, richer flavor. But it also often suffers from fine sediment mixing into the cup and affecting the mouthfeel. In fact, as long as you get the grind size, coffee-to-water ratio, steep time, and pouring timing right, and pair it with a second pass through a paper filter, you can make French press coffee approach the clarity of a pour-over. This article organizes the complete key points of French press brewing, from bean selection and grinding to brewing, and uses Front Street Colombia Huila coffee beans as an example to explain why medium-dark roasted beans are better suited to immersion extraction, and why light-roasted Ethiopian beans are not recommended for the French press. [more…]

Pour-over coffee has now become one of the most mainstream brewing methods in the specialty coffee world, but its origins can be traced back to a flash of inspiration from a German housewife over a hundred years ago. From the early prototype of filtering coffee with blotting paper to Melitta's continuous refinement of the dripper design, how have pour-over brewing tools evolved? This article not only traces the historical thread of pour-over coffee but also presents a complete pour-over tutorial, using "Front Street Coffee Flower Queen" coffee beans as an example to explain every step of the three-stage brewing process—blooming, main extraction, finishing and blending—along with a buying guide to several Front Street Coffee-recommended beans suited to different taste preferences. [more…]

For a long time in the past, people around the world made coffee in a simple and crude way: they ground coffee beans, put them into a pot to boil, and then filtered out the grounds with burlap or a metal strainer before drinking it directly. Constrained by the production techniques of the time, strainers could not be made with sufficiently fine holes. [more…]

Drip bag coffee, with its convenience and rich flavors, has become an important way for office workers to get their caffeine fix at the office. But exactly how much caffeine does each drip bag contain? How many bags a day can you drink without overdoing it? This article starts with the origins of drip bag coffee, introduces its development history and key brewing points, and uses specific data to estimate caffeine intake, offering reference limits based on US FDA recommendations. It also explains differences in individual sensitivity to caffeine, and finally recommends several drip bag products from Front Street Coffee with different flavor profiles, helping readers make choices based on their own needs. [more…]

When making cold brew coffee at home, an oily sheen often floats on the surface, and fine sediment may appear at the bottom of the cup, leaving many coffee enthusiasts puzzled. What exactly are these floating substances? Is the coffee spoiled, or is the equipment unclean? In fact, this is closely related to the slow release of water-soluble fats from coffee beans at low temperatures. This article, drawing on Front Street Coffee's practical experience, analyzes the causes of cold brew oils, explains how the differences in mesh sizes of various filtering devices affect coffee flavor, and shares how to use secondary filtration with paper filters and refrigeration settling to make cold brew's juicy feel fuller and its acidity clearer. At the same time, regular deep cleaning of equipment is equally crucial to avoid the accumulation of condensed oil residue that produces a rancid odor. [more…]

When extracting espresso, you may occasionally notice a layer of fine black sediment at the bottom of the cup, and many people worry that this indicates an equipment malfunction or spoiled coffee. In reality, these black particles are simply coffee fines—extremely small particles that can easily pass through the holes in the portafilter basket and mix into the coffee liquid under high pressure. At first they hide within the crema, and only as the bubbles burst do they sink to the bottom of the cup and become visible to us. Moka pots also use pressure extraction, so a similar situation can occur. Although coffee grounds are a woody fiber, the extremely fine particle size and tiny intake amount pose no health risk, so you can drink with complete peace of mind. This article explores the origins of fines, whether the portafilter basket will deform, and fine particle size, helping coffee enthusiasts better understand these common phenomena. [more…]

Have you ever suddenly found yourself out of filter paper while brewing coffee at home—does that leave you completely stuck? Actually, that's not the case. Filter paper is indeed indispensable for pour-over and other drip-style extractions, but if you switch to immersion extraction, its role becomes optional. Immersion extraction means fully steeping the coffee grounds in water. The extraction efficiency gradually slows as the water temperature drops and the concentration difference decreases, so over-extraction is less likely, the margin for error is higher, and the mouthfeel is fuller. Even without any filtering tool, as long as you master a few small techniques, you can still brew a clean, grit-free cup of coffee. In this article, Front Street Coffee will use a native variety from Ethiopia's Kafa Forest, relying on just two containers and a spoon, to test the entire process of filter-free immersion extraction, and compare the core differences between immersion and drip methods. [more…]

Egg coffee isn't only a Vietnamese specialty—Nordic countries also have an old method of brewing coffee with eggs. The Vietnamese version whips egg yolks into a creamy substitute for milk, born in wartime Hanoi when supplies were scarce; the Nordic version uses egg whites to bind the coffee grounds, leaving the brewed coffee clear and sediment-free. Front Street Coffee walks you through the origins, principles and home-friendly methods for both styles of egg coffee, including how to choose pasteurized eggs, the ratio of coffee liquid to egg cream, and Front Street's own tested brewing tweaks, so you can recreate these two intriguing flavors at home. [more…]

Pour-over coffee has now become the go-to brewing method for countless enthusiasts in their daily routines—weighing beans, grinding, folding paper, pouring water—every step is full of ritual. But have you ever wondered where this drip-filter brewing method actually came from? And who invented the first dripper and filter paper? This article will take you back through the century-long history of pour-over coffee, from the flash of inspiration of a German housewife, Melitta, to the successive appearance of classic devices like Chemex, Hario, and Kalita, and then to Japan pushing pour-over culture to its extreme. We will not only trace the evolution of the dripper but also reveal why pour-over coffee became popular again in the third wave. Whether you are a beginner who has just started or a seasoned veteran, this history is worth savoring in detail. [more…]

The French press, with its simple operation and easy-to-master nature, has become the go-to device for many pour-over beginners. It was born in France around 1850, consisting of a heat-resistant glass carafe and a metal plunger with a mesh filter. It was originally used for brewing tea, but later coffee enthusiasts discovered it could produce a rich, full-bodied cup. The French press uses immersion extraction, and the core factors affecting flavor are only grind size, water temperature, and steeping time, with minimal human interference, making it the best way to showcase the true character of coffee beans. In this article, Front Street Coffee will provide a complete guide to the correct use of a French press, from extraction principles and flavor characteristics to practical operation, and answer what coffee beans pair best with a French press, helping you easily make a rich, delicious cup of coffee. [more…]

Unlike pour-over, the AeroPress uses immersion combined with pressure for extraction. It can brew strong coffee, is easy to clean, and is relatively simple to operate. Where did the AeroPress come from? In 2005, Alan Adler, who was an engineer, physicist, and lecturer at Stanford University, found that he really had no patience to use [more…]

The French press, with its full-immersion design and metal filter, can brew coffee that is rich in oils and full-bodied. But if you want to drink a good cup of coffee, you need to get several variables right: grind size, coffee-to-water ratio, water temperature, and steeping time. This article takes a practical approach and breaks down the key parameters of French press brewing one by one: how coarse the coffee grounds should be, how to adjust the 1:15 coffee-to-water ratio, why the water temperature should be slightly higher than for pour-over, and how to determine the four-minute steeping time, along with recommendations for coffee beans suitable for the French press and buying advice for Front Street Coffee. Whether you are a beginner who has just gotten into French press brewing or an enthusiast looking to refine your skills, you can find actionable brewing ideas here. [more…]

The French press, with its simple operation and rich, full-bodied flavor, has become the daily go-to for many coffee lovers. It uses full-immersion extraction, and its metal filter allows the coffee oils to be retained, delivering a rich, substantial taste experience. However, to brew a good pot of French press coffee, every step—from bean selection to grind size, water temperature control, and steeping time—requires attention. This article will systematically outline the types of coffee beans suited to the French press, explain the specific standards for coarse grinding and the coffee-to-water ratio in detail, and provide a complete brewing process. It will also offer reference on how to use a Starbucks French press, helping you easily recreate a cup of outstanding immersion-brewed coffee at home. [more…]

To easily make a rich cup of black coffee at home, the French press is one of the lowest-barrier options, and its operation is quite similar to brewing tea. This article begins with the origin and structure of the French press, then sorts out the key parameters affecting extraction—grind size, water temperature, coffee-to-water ratio, and steeping time—and gives specific recommendations for medium-light and medium-dark roasted beans. It also reminds readers of the deep-cleaning points after use, as well as the French press's expanded uses in brewing tea, frothing milk, and more. The parameters and product information recommended by the Front Street brand in the article are all retained, making it suitable for coffee enthusiasts who want to systematically master French press brewing. [more…]