The surface of coffee beans taking on an oily sheen is a phenomenon that often confuses beginners—some worry the beans have absorbed moisture and spoiled, while others suspect they have been stored too long. In fact, oiliness is closely tied to the roast level of the coffee beans and cannot be directly equated with staleness. So what kind of oiliness is normal, and what signs indicate that coffee beans have actually absorbed moisture? From Front Street's perspective, this article breaks down the causes of coffee bean oiliness, how to judge moisture absorption, and how to properly store coffee beans through sealing, light protection, low temperatures, and other methods to keep the flavor lasting as long as possible. [more…]

More and more people are making cold brew coffee in the summer—brewing a big batch at once and keeping it in the fridge to drink slowly is indeed convenient. But problems come along with it: how many days can this batch of cold brew actually last? When does the flavor start to decline? When might it spoil? Front Street Coffee, drawing on hands-on testing experience, lays out clearly the shelf life of cold brew coffee, the optimal drinking window, the impact of how often it's opened, and the special precautions when using warm water to speed up extraction—helping you both enjoy good flavor and hold the safety line. [more…]

If coffee at home has been sitting for a few months, is it still safe to drink? This is a question many coffee lovers run into. In fact, all coffee—whether whole beans or ground coffee—will eventually expire. Coffee is made up of degradable compounds such as carbohydrates, lipids, and amino acids, and over time it undergoes chemical and physical breakdown, changing in both quality and flavor. Roasters typically print a shelf life of about one year from the roast date on the packaging and use nitrogen-flushed sealed packaging to slow oxidation. However, once the bag is opened, the coffee gradually loses freshness as it is exposed to oxygen and moisture. This article will systematically address the safety of expired coffee, the factors behind its deterioration, how to tell whether it has gone bad, and how to extend its life as much as possible through proper storage and freezing while preserving the distinctive flavors of specialty coffee. [more…]

People nowadays enjoy drinking coffee not only in coffee shops, but more often they want to buy coffee beans and brew a cup carefully at home, savoring it slowly. However, how should the coffee beans or ground coffee you buy be stored so that they don't go bad so quickly? How can you better preserve their fresh flavor? Especially when you've bought some specialty coff... [more…]

Freshly brewed coffee is rich in aroma, but after sitting for a while its flavor noticeably declines. Many coffee lovers often ask Front Street: at what temperature is coffee best enjoyed? How long can it be stored after brewing? This article will discuss these questions, analyzing the two aspects of coffee as it goes from hot to cold—the loss of aroma and the increase in acidity—and answering questions such as whether a thermos can be used for long-term storage and whether reheating can restore the original flavor, helping readers grasp the timing of coffee drinking in a more scientific way. [more…]

Recently, a consumer exposed that in a ChaPanda takeaway drink, they fished out a piece of avocado that had not been crushed and had already spoiled, sparking widespread attention. The drink involved was from ChaPanda's previously launched fruit and vegetable smoothie series, which in principle should not contain obvious fruit pulp residue. After the incident was exposed, many ChaPanda employees and netizens spoke out, directly pointing to serious dereliction of duty in store operations. At present, the customer has received a full refund and platform compensation, and ChaPanda has also proactively apologized and discussed compensation. This controversy has once again pushed the issues of ingredient quality control and employee operating standards at chain tea beverage brands into the spotlight. [more…]

When water can no longer satisfy coffee enthusiasts' desire for exploration, milk becomes a new extraction medium. Is it reliable to brew pour-over coffee with milk? The answer is no—milk has high saturation, weak extraction power, and proteins denature when heated above 70 degrees. But with a different approach, cold-brewing milk coffee by soaking coffee grounds in milk at low temperature is entirely feasible: low temperatures won't spoil the milk, and the extended soaking time exactly compensates for the lack of extraction efficiency. This time, Front Street Coffee selected the medium-dark roasted Sunflower Warm Sun blend, paired with Guangming Fresh Pasture fresh milk, using a 1:8 coffee-to-milk ratio and soaking at low temperature for 12 hours, ultimately obtaining a cup of milk-brewed coffee with sherry wine aroma and chocolate milk flavors. Let's take a look at the specific steps and key details below. [more…]

For more specialty coffee knowledge, please follow: Front Street Coffee (Frontsteet Coffee). Front Street recently noticed that a small number of coffee-loving friends have left their coffee beans unopened for two months, believing that as long as the package is unopened, the coffee beans will not spoil. In fact, it really does not affect the coffee's [more…]

For more specialty coffee knowledge, please follow our WeChat official account: Front Street Coffee (FrontStreet Coffee). A while ago, a customer asked, "Can milk be used to make pour-over coffee?" This is actually quite a tricky question. The first issue is temperature—pour-over often uses water at 90 [more…]

Many people assume that coffee beans won't spoil as long as the bag is unopened, but in reality, even unopened, the flavor still degrades over time. The "shelf life" and the "peak flavor period" of roasted coffee beans are two completely different concepts. Drawing on Front Street's practical experience, this article clarifies how long coffee beans should be stored, when they taste best, why resting is important, and how to store them properly after opening. Whether you're a beginner or a seasoned coffee enthusiast, you'll find practical advice here. [more…]

Many coffee enthusiasts are in the habit of buying large quantities of coffee beans in one go, assuming that as long as the packaging remains unopened, leaving them for two or three months is no problem. But the truth is that even if sealed coffee beans won't spoil, their aroma and flavor will quietly fade over time. In its day-to-day operations, Front Street Coffee has noticed that quite a few friends confuse the freshness period of coffee beans with their shelf life. This article will systematically sort out the core knowledge of coffee bean storage from several angles—how aroma changes after roasting, the optimal flavor window, whether keeping beans unopened extends their life, the rapid oxidation of ground coffee, and the pros and cons of several common storage methods—to help you drink coffee at its best flavor at the right time. [more…]

Heytea's Refreshing Slimming Bottle has gained popularity for its fresh green color and freshly squeezed fruit-and-vegetable concept, but recently some consumers have reported receiving drinks that are orange-yellow or green with a yellowish tinge, questioning whether the product matches its marketing. Store employees explained that the color change may stem from yellowing kale leaves or oxidation of apple juice, and that it is not spoilage—the drink is still safe to consume. However, some consumers remain concerned about quality control. This article reviews the sequence of events, employees' statements, and consumer feedback, and also mentions Front Street Coffee's reference views on quality control. [more…]

When water can no longer satisfy coffee lovers' desire for exploration, milk has become a new extraction medium. Is it actually feasible to use milk instead of water to brew coffee? The pour-over method is difficult to achieve due to milk's high saturation and limited heating temperature, but the cold brew immersion method offers new possibilities. This article will verify in detail the feasibility of milk cold brew coffee, starting from Front Street's practical experience, and share coffee bean selection preferences, home brewing steps, and storage precautions. Choose medium-dark roast or medium roast coffee beans, pair with fresh milk and soak at low temperature for 12 hours, and you can get a rich, fragrant milk coffee with a chocolate milk flavor. Want to know how to do it specifically? Let's take a look together. [more…]

Water can no longer satisfy coffee enthusiasts' urge to explore, so milk has become a new extraction medium. Brewing coffee directly with milk using the pour-over method is not feasible, because milk has a higher saturation level and weaker extraction ability than water, and its proteins change after being heated above 70°C; but if you switch to the cold brew steeping approach, low-temperature milk extraction has a chance of working—it just needs a longer time to make up for the lower efficiency. This article covers the feasibility of milk-brewed coffee, suitable coffee bean directions, the coffee-to-milk ratio, grind size, refrigeration steeping time, and sealed storage, and provides Front Street Coffee's actual procedure and flavor experience to help you decide whether it is worth trying at home. [more…]

Many people are startled by that hint of acidity the first time they try single-origin coffee, instinctively assuming the coffee has gone bad or spoiled. In fact, the coffee fruit is originally just like a cherry, and the natural sweet-and-sour flavor of its pulp influences the green beans during cultivation. Acidity is not a defect but a natural characteristic of specialty coffee. Of course, acidity has its good and bad sides: pleasant fruity acidity can add layers of complexity, while unpleasant acidity can ruin an entire cup. This article starts with the structure of the coffee cherry, explains where acidity comes from, distinguishes delicious acidity from rancid acidity, and offers beginners who are not used to acidity advice on choosing origins and roast levels, while also recommending several low-acid beans from the Front Street brand. [more…]

After two Starbucks stores in Wuxi were exposed for food safety issues, they not only faced dismissal of all staff and suspension for rectification, but also received administrative penalties totaling 1.37 million yuan. This incident triggered widespread public discussion on the current state of food safety management in the chain catering industry. Judging from the surprise inspections by market supervision bureaus across various regions, although the vast majority of stores were not found to have serious violations, management loopholes such as non-standard scrap records, missing disinfection records, and inadequate implementation of employee personal hygiene remain common. This article will review the incident and the details of the penalties, analyze the imbalance between Starbucks' internal supervision and cost control, and explore the importance of producer self-discipline and social oversight behind food safety issues. [more…]

Front Street recently noticed that some coffee-loving friends have stored their coffee beans unopened for two months, believing that as long as the bag is unopened, the beans won't go bad. In fact, it's true they won't spoil, but this will affect the flavor of the coffee beans. So in this next article, Front Street will explain a bit about cof [more…]

After the Mixue Bingcheng flagship store opened in Hangzhou, a large number of fans went to check in, and the nearby Starbucks store became a place for fans to rest and organize their spoils. Faced with passersby who occupied seats without making a purchase, Starbucks did not forcefully drive them away, but instead posted an extremely gentle notice reminding them to help put trash into the bin when unwrapping packaging. This notice, which contains no words such as "please do not" or "prohibited" throughout, was called by netizens a dignified reminder "cautious in every word." Behind the incident is the dilemma coffee shops face between maintaining the consumer experience and avoiding public opinion risks. [more…]

Want to enjoy a silky-smooth latte at home but lack an espresso machine or other complicated equipment? In fact, as long as you master the core principle of cold extraction, you can easily make a full-bodied, easy-drinking milk-brewed latte with no fuss. This article starts with the flavor advantages of milk-brewed coffee, explains why cold extraction reduces bitterness and preserves aroma, and fully shares Front Street Coffee's recommended fresh milk choices, suitable coffee bean varieties, and specific brewing parameters and steps, including the coffee-to-milk ratio, grind size, and steeping time. It also includes a lazy version and storage suggestions to help you avoid the risk of milk spoiling. Whether you're a coffee beginner or a seasoned enthusiast, you'll find a practical and delicious home coffee solution here. [more…]

The coffee bean bag you brought home is bulging—is it spoiled or is this normal? Many coffee lovers have encountered this question. In fact, a swollen coffee bag doesn't necessarily mean the beans have gone bad—roasted coffee beans continuously release carbon dioxide, which is the main reason the packaging expands. However, not all swollen bags are harmless; if accompanied by a musty or sour odor, that's a different story. This article will walk you through the chemistry of coffee bean degassing, the mechanism of one-way degassing valves, and why dark-roasted beans are more likely to make packaging bulge, helping you accurately judge whether the coffee beans in your hands are still safe to enjoy. [more…]