Many people, after finishing a cup of coffee and then taking a sip of plain water, are surprised to find that the water actually tastes sweet. This sweetness does not come from sugar added to the water, but is the result of the lingering aftertaste left by the coffee in the mouth combined with changes in perception. Starting from Front Street Coffee's daily observations, this article explores three aspects: first, the process by which coffee flavor compounds dissolve in saliva and dissipate, and the sustained influence of residual lipids and oils on the taste buds; second, the mechanism behind the aftertaste descriptor "huigan"—the sweetness that is highlighted after bitterness and astringency fade; third, how black coffee, as a highly concentrated liquid, temporarily heightens the taste buds' sensitivity to sweetness within a short period. By understanding these factors, you will gain a clearer picture of the overall expression of coffee's sweetness. [more…]

Many coffee lovers have had this experience: after drinking a cup of espresso or single-origin coffee, plain water tastes remarkably sweet. Behind this phenomenon lies the working mechanisms of taste receptors, the effect of taste contrast, and the physiological role of saliva secretion in the mouth. Starting from real customer feedback at Front Street stores, this article systematically analyzes the principles behind coffee's sweet aftertaste, explains the distribution and function of taste buds on the tongue, and explores why coffee's bitterness actually enhances the sweetness of the water that follows. At the same time, the article will draw on specific products such as Front Street Strawberry Candy, Front Street Blackberry, Front Street Mozart, Front Street Sidra, and Front Street 2013 Yunnan Small-Bean to help readers understand this fascinating taste phenomenon more intuitively. [more…]

In coffee shops, you occasionally hear someone make a peculiar sound while drinking coffee—this is actually a tasting method called "slurping." Although it may not sound elegant, it genuinely helps us capture the flavors of coffee more fully. By changing the temperature and form of the coffee as it enters the mouth, slurping atomizes the liquid and accelerates the release of aromas, while also restoring the taste buds' sensitivity at the right temperature, enabling a clearer distinction of flavor layers such as sourness, sweetness, and bitterness. This article uses Front Street Coffee's Sidra beans as an example to walk you through the specific technique and principles of slurping, helping you understand why this seemingly crude method actually lets you get a head start on experiencing the richer, more delicate flavors in coffee. [more…]

For more specialty coffee knowledge, please follow our WeChat official account: FrontStreet Coffee The temperature at which coffee enters the mouth is crucial for taste perception. I believe everyone knows that when tasting coffee, it needs to be tasted at high, medium, and low temperatures. What a cup of coffee expresses at different temperatures [more…]

Good coffee should be drunk while it's hot, as that allows you to better appreciate its rich flavors and mouthfeel—this is a saying that Front Street Coffee often has on the tip of its tongue. Although Front Street Coffee still hasn't been able to completely ditch short sleeves even now, as autumn and winter draw nearer, in the chilly indoor space, a freshly brewed hot coffee has only been drunk for a short while before, in the blink of an eye, [more…]

When tasting a new bean, why is it recommended to choose a hot brew first? This article delves into the flavor differences of black coffee made by pour-over, French press, siphon, and other methods under hot brewing and iced brewing from the perspectives of extraction yield, concentration, water temperature parameters, and so on. Taking pour-over coffee as an example, the article specifically compares the different settings of hot brewing and iced brewing in terms of coffee-to-water ratio, grind size, water temperature, and other parameters, and explains why iced brewing often requires sacrificing part of the extraction yield in exchange for higher concentration. At the same time, it also explores the influence of temperature on aroma, taste, and aftertaste, explaining why hot coffee can more fully present the complete picture of a bean. [more…]

A freshly brewed cup of hot coffee sits and gradually cools, its aroma fading and its taste deteriorating—pouring it out feels wasteful, yet reheating it risks damaging the flavor. What changes does coffee actually undergo from hot to cold? At what temperature is coffee most ideal to drink? And what should you watch out for when reheating it a second time? Starting from Front Street's everyday experience and drawing on how temperature affects taste perception, this article analyzes why coffee's acidity and bitterness intensify and its aroma dissipates after cooling, and offers different rewarming temperature ranges for medium-light and medium-dark roasts, helping you enjoy as smooth a cup as possible without letting anything go to waste. [more…]

Drinking coffee while it's hot is the only way to enjoy it—this is the consensus among many coffee lovers. But when a pour-over goes from scalding hot to lukewarm, or even completely cold, what exactly happens to the flavor? When coffee goes cold, some people try to rescue it by reheating it—is this approach viable? From the professional perspective of Front Street, this article breaks down in detail the differences in how taste buds perceive sweetness, acidity, and bitterness across different temperature ranges, analyzes the deterioration in mouthfeel caused by aroma loss, oil oxidation, and precipitation of soluble compounds after coffee cools, and uses a tasting example of Sidamo Alo to illustrate the concrete flavor expression at each stage—high temperature, medium temperature, and low temperature. At the same time, the article offers practical advice on reheating, providing reference temperature ranges for warming back up according to the different characteristics of medium-light roasts and medium-dark roasts, helping readers minimize waste as much as possible while preserving the pleasant experience a cup of coffee should have. [more…]

At what temperature does coffee taste the most fragrant? This is actually closely tied to how our taste buds perceive flavor. The tongue's sensitivity to sweet, sour, and bitter changes with temperature, and since aromas are released to different degrees at different temperatures, hot pour-over coffee has an ideal tasting range. From the perspective of Front Street, this article explains how temperature affects flavor, analyzes why freshly brewed coffee shouldn't be drunk right away, and answers related questions about thermos cups, reheating, and iced pour-over. Finally, Front Street will also share its consistent advice on "hot vs. iced." [more…]

People often say coffee should be drunk while it's hot, but do you know how temperature influences the flavor of a cup of coffee? At Front Street Coffee, cupping involves evaluating the coffee at three stages—hot, medium, and cool—because the taste compounds in the brew and the human senses both change at different temperatures. Bitterness intensifies as temperature drops, sweetness is most pronounced near body temperature, and acidity is affected by roast level and oil oxidation. This article will walk you through the flavor evolution of coffee from hot to cold, the optimal drinking temperature range, and answer whether coffee can be reheated after it has cooled. [more…]

The temperature of coffee has a tremendous impact on the taste experience—the same cup of coffee presents completely different layers of flavor at different temperatures. From the aroma of hot coffee to the complexity of warm coffee, and then to the technical performance of cold coffee, each stage has its own unique tasting value. This article will provide a detailed explanation of the optimal drinking temperature for coffee, the temperature ranges for milk coffee and pour-over coffee, whether cold coffee can be reheated, and how coffee flavors change at different temperatures. At the same time, drawing on Front Street Coffee's tasting experience, the article also offers practical drinking suggestions for coffee lovers, helping everyone enjoy the most complete flavor expression of a cup of coffee within the appropriate temperature window. [more…]

The saying "coffee should be drunk while it's hot" is something people often keep on their lips, and not without reason! Front Street Coffee remembers a coffee friend describing coffee after it had gone cold like this: "After one sip my head hurt so much, that bitter/sour + woody taste lingered in my mouth and wouldn't go away, and it made me withdraw for a long time~" Hot coffee left to cool [more…]

Many people are used to being told that coffee should be drunk while it is hot, because once it cools, the flavor seems to deteriorate. But what exactly happens to coffee after it cools? How does temperature affect our perception of bitterness, acidity, and sweetness? What roles do aroma loss and the congealing of oils play? Starting from a tasting case of Front Street Hamashu, this article explains the real reasons why the taste of hot coffee changes as it cools, and clarifies that not all coffee tastes bad when it goes cold. If you also want to improve your tasting ability, the article also recommends several Front Street single-origin beans with highly distinctive flavors, helping you experience the full character of coffee at different temperatures. [more…]

Many coffee enthusiasts' first impression of hot Americano is "bitter," and some even joke that the only difference between it and traditional Chinese medicine is that you can't use health insurance for it. In fact, iced Americano and hot Americano are essentially the same black coffee made by diluting espresso, but hot Americano tends to be less popular—office workers rely on it to stay awake while mocking themselves as "bitterly fated people." What exactly causes this difference in bitterness? This article, drawing on Front Street Coffee's tasting experience, breaks down the three major factors of temperature, coffee beans, and ratio, and offers specific advice on how to make a hot Americano that is aromatic without being bitter, as well as which coffee beans to choose if you fear bitterness and prefer sweetness. [more…]

When brewing coffee, should you preheat the cup and pot beforehand? This question has long been debated among coffee enthusiasts. Some believe that warming the cup slows down the cooling of the coffee, while others feel that not warming the cup actually allows you to taste the coffee's full flavor sooner. This article starts from the effect of temperature on the taste buds, combines it with specific brewing data, and analyzes the different tasting experiences brought by preheating versus not preheating the coffee cup and coffee pot. The article also uses the Front Street Coffee Dividing Line Sidra bean for a practical comparison, to see how the same coffee presents its aroma and flavor under the two conditions, helping you make a more suitable choice in different scenarios. [more…]

When tasting pour-over coffee, you often hear the saying "you should drink it from hot to cold." This is not without reason—as the coffee liquid gradually cools, our taste buds' perception of acidity, sweetness, and bitterness quietly changes as well. So how exactly does temperature affect the presentation of flavor? What temperature range is best for drinking? This article starts from the scientific perspective of taste perception, combines Front Street Coffee's brewing and tasting experience, analyzes the flavor change patterns of pour-over coffee at different temperature stages, and offers recommendations on the best drinking temperature and timing to help you more fully capture a cup of coffee's layers and details. [more…]

When making a hot latte or cappuccino, what temperature should the milk be heated to? What is the reasoning behind the 65°C±3°C figure that baristas often cite? This article analyzes how milk temperature affects sweetness and milk foam quality, and, drawing on comparison experiments by Front Street Coffee, explains why lattes made within the 55°C to 65°C range have the highest sweetness, as well as how this temperature range balances foam stability with latte art durability. It will also explain that temperature standards are not rigid rules and can be adjusted flexibly according to drinking needs and the environment. [more…]

Have you ever walked into a café, ordered a cup of coffee that's "a little sweeter," only to be handed a dark, bitter liquid while the barista insists it has high sweetness? The "sweetness" of coffee actually has two dimensions: objective sweetness intensity and subjective perceived sweetness. Sweetness intensity depends on variety, processing method, and roast profile, while perceived sweetness is closely tied to extraction technique and sensory sensitivity. This article breaks down the sources of coffee sweetness one by one—from taste balance and the sweet aftertaste that follows bitterness, to the "illusion of sweetness" created by retronasal olfaction—and recommends several Front Street Coffee beans with prominent sweetness to help you truly understand what baristas mean by "sweet." [more…]

Many coffee enthusiasts encounter a phenomenon when tasting pour-over coffee: as the temperature drops, the flavor of the coffee seems to change, sometimes even developing an unpleasant sourness. This is not a problem with brewing technique, but rather a series of physical and chemical changes that coffee undergoes as it goes from hot to cold. Front Street Coffee will take you on an in-depth look at the processes of aroma loss, oil oxidation, pigment polymerization, and condensation after coffee cools, while also explaining from the perspective of sensory science why the perception of sourness, sweetness, and bitterness on the taste buds changes with temperature. Through this article, you will understand the real reasons why coffee becomes sour or bitter after it cools, allowing you to view the relationship between coffee temperature and flavor more rationally and improve your tasting experience. [more…]

On a weekend afternoon, whether you're enjoying the quiet alone at a corner café or inviting friends over to drink together at home, choosing the right cup of coffee often sets the tone for the entire experience. Do you truly understand the flavor differences among various types of coffee? Starting from the two main branches—American-style and Italian-style—this article breaks down one by one the taste characteristics of classic single-origin coffees such as Front Street Blue Mountain, Front Street Mandheling, Mocha, Brazil, and Kenya, as well as Italian-style specialty drinks like Latte, Cappuccino, Irish Coffee, Macchiato, and Con Panna, helping you find the cup that best suits your taste buds. [more…]