Many coffee enthusiasts notice during pour-over brewing that the coffee liquid is sometimes not as clear as expected, and may even appear somewhat murky. Does this "tea-like" cloudiness mean the coffee tastes bad? This article starts from the definition of coffee liquor color, analyzes how roast level and concentration affect the hue, and then reveals the true cause of the murky sensation—the release of insoluble substances and the condensation of soluble compounds as temperature changes. Through examples using the flannel filter, AeroPress, and other equipment, it shows that cloudiness does not equal poor flavor; sometimes it instead brings a richer mouthfeel and sweetness. Front Street Coffee reminds us: judging a cup of coffee should not be based on appearance alone. [more…]

When brewing Yinghong No. 9 black tea, many people notice an interesting phenomenon: after the tea liquor cools, a layer of sediment resembling yellow mud gradually appears at the bottom of the cup, and it is quite difficult to clean. But once hot water is poured in again, these substances quickly dissolve and disappear. Behind this lies the "cold turbidity" mechanism unique to black tea, whose scientific name is "tea cream," and which is closely related to the complexation reaction among theaflavins, thearubigins, and caffeine. Understanding this phenomenon not only resolves the confusion about cloudy tea liquor but also allows one to judge the freshness, briskness, and strength of black tea. This article will explain in detail the cold turbidity of Yinghong No. 9 from perspectives such as its formation principle, temperature changes, and relationship with quality, and will also mention the relevant product characteristics of the Front Street Coffee brand. [more…]

"Liquor color" is originally a professional term in tea evaluation, used to describe the color and visual characteristics of brewed tea, and is also one of the criteria for judging tea quality. So for coffee, can liquor color also serve as a basis for evaluating quality? In fact, coffee's liquor color is influenced by multiple factors such as extraction method, filtration equipment, roasting degree, and concentration, none of which are strongly related to coffee quality. Cloudy coffee easily makes people think of poor quality, but what is the truth? Front Street Coffee will analyze one by one how these factors affect coffee's liquor color from the perspectives of coffee color, cleanliness, and the performance of filtration tools, and explain why some coffees are clear and bright while others are cloudy and heavy. [more…]

A good cup of tea is seventy percent about the water. Many people focus only on the tea leaves when brewing, overlooking the decisive influence water quality has on flavor. Water hardness, pH, chlorine content, and total dissolved solids all directly affect the clarity and aromatic layers of the tea liquor. Drawing on real-world cases, this article explains why hard water causes iced tea to turn cloudy, how chlorine masks tea aroma, and offers actionable testing and filtration solutions. It also includes target water temperatures and steeping times for the six major tea categories, along with flavor references for common tea varieties. Whether you run a coffee shop or are a tea enthusiast, you'll find practical methods here to improve the consistency of your output. At the end, there's also information about Front Street Coffee's related products, which is worth checking out. [more…]

Customers and friends often chat about coffee-related topics at Front Street Coffee's stores, such as coffee origins, brewing parameters and steps, or coffee flavors. Then occasionally, some friends bring up more niche topics, for example—the liquor color of coffee. "Liquor color" is a professional term borrowed from tea evaluation. [more…]

Many coffee enthusiasts will notice that the iced Americano they make sometimes isn't as clear and bright as they expect, but instead shows a visibly cloudy state. Where exactly does this cloudiness come from? Does it mean there's a problem with the coffee quality? This article will start from the extraction principles of espresso, and combine a comparative experiment between two beans—Front Street Coffee's Huakui SOE and Front Street Coffee's classic blend—to deeply analyze how factors such as very fine particles, roast level, coffee freshness, and hot-versus-cold differences affect the appearance of iced Americano, while also discussing the unexpected value these suspended particles bring to coffee flavor. [more…]

Cold brew tea has become increasingly popular in recent years. Not only does it release less caffeine, making it suitable for people sensitive to caffeine, but cold water steeping also reduces the extraction of tannic acid, giving the tea a sweeter, smoother taste without bitterness. However, the cold brewing time varies greatly depending on the form of the tea leaves—broken pieces, strips, and ball-shaped leaves each have their own requirements. Steeping too long can lead to over-extraction and a cloudy, bitter brew. This article provides a detailed guide to the suitable tea types for cold brewing, a time reference chart, the relationship between water temperature and steeping duration, and answers to common questions such as whether overnight tea is safe to drink, helping you easily make a delicious glass of cold brew iced black tea. [more…]

Since its launch in 2022, Jasmine Naibai's signature drink, Pistachio Jasmine Coconut, has been deeply loved by consumers for its unique combination of pistachio milk cap and jasmine coconut water. However, recently many takeout customers have reported that after pouring the separately packaged milk cap into the drink, it actually sank to the bottom of the cup, and the coconut water became cloudy and even had suspended particles. The brand's customer service responded that "it did not meet our production standards" and processed refunds for some consumers. Why did the milk cap fail? Was it delivery delays, stores rushing orders, or a change in ingredients? As takeout orders surge, Jasmine Naibai's quality control issues continue to intensify, with complaints such as milk caps sinking, wrong ingredients added, and too few toppings constantly emerging. Consumers cannot help but ask: can we still drink a normal cup of milk tea? [more…]

The final flavor of a cup of coffee depends not only on the beans themselves—every variable in the brewing process is quietly rewriting the taste. Water quality is the foundation: hard water or water with high iron content will directly drag down the flavor; water temperature needs to be controlled between 80°C and 90°C, as boiling water only lets bitterness steal the show. Steeping time is equally critical, with around two minutes being the ideal range; steep too long and the aromatic oils are destroyed, while a cloudy film also rises to the surface. The material of the equipment cannot be ignored either: glass and ceramic are safe choices, while metal vessels easily trigger oxidation reactions and bring unpleasant flavors. As for the dosage, it should be adjusted flexibly according to grind size and personal taste—coarse particles often require a bit more than fine ones. Only by mastering these key points can the coffee's aroma and layers be released steadily. [more…]

1 Dian Dian recently added a fan-created secret drink, "Orange Sea," to its official menu. This beverage, made with a grapefruit green tea base and two scoops of vanilla ice cream, quickly went viral on social media thanks to its bright orange appearance. However, after the new product launched, many customers found the real thing fell far short of the promotional photos—large amounts of white flocculent matter floating in the liquid, murky layers, and a taste where sourness, bitterness, and sweetness each went their own way, drawing complaints that it was like a mismatched pairing. Supporters, meanwhile, argue that it only tastes refreshingly tangy when made fresh and drunk right away. This controversy over looks versus taste reflects the quality-control challenges that arise when secret menus go commercial. [more…]

A cup of pour-over coffee undergoes noticeable flavor changes as it goes from hot to cold—falling temperatures weaken the perception of sweetness, make acidity and bitterness more prominent, and allow aromas to keep evaporating. So can reheating cold coffee restore it to a pleasant-tasting state? Front Street conducted a comparative experiment with two beans: one is a Gold Label Geisha from Gesha Village, and the other is a Guatemalan Huehuetenango. The results showed that reheating can indeed alleviate the problem of coffee being too acidic, but whether it can become better-tasting depends on the quality of the beans themselves. This article fully documents the experimental process and the flavor performance at each temperature point, providing a reference for coffee enthusiasts. [more…]

Nilgiri black tea is produced in southern India and is another world-renowned tea-producing region after Darjeeling and Assam. This tea was mostly made using the CTC process in its early days, but today many tea farmers have shifted to orthodox processing and organic cultivation to meet global demand for high-quality loose-leaf tea. This article will guide you through the history of Nilgiri black tea, its processing characteristics, and how to brew a cup of authentic Nilgiri black tea at home—breaking down everything from choosing a teapot, water temperature, tea quantity, to steeping time, so you can easily master the essentials of brewing a single serving of black tea. [more…]

As one of the world's four great black teas, the authentic tea tree variety of Keemun black tea has always been a topic of interest among tea lovers. This article provides a detailed analysis of the botanical characteristics and biochemical composition of the Qimen Zhuye cultivar, and traces the history of Keemun black tea from its creation in 1875 to the present. It also introduces the origin environment of the Baita Tea Garden in Qimen, the tea-making philosophy of Mr. Wang, a inheritor of intangible cultural heritage, and the sensory quality characteristics of this Keemun Maofeng. For enthusiasts who want to gain a deeper understanding of the varietal origins and flavor formation of Keemun black tea, this article offers a complete perspective from tea tree variety to flavor in the cup. Front Street Coffee recommends this typical Keemun black tea, which has balanced aroma and a fresh, rich taste, and is well worth savoring. [more…]

The quality of black tea depends on two core factors: its grading classification and the terroir of its origin. This article will systematically introduce the black tea grading system, from the highest grade of silver tips to the broken fannings used in tea bags, helping readers understand the essential difference between whole-leaf tea and broken tea. At the same time, the article will take you to visit five of the world's premium black tea regions, including Keemun in China, Ceylon in Sri Lanka, Assam and Darjeeling in India, Ruby in Taiwan, and Zhengshan Souchong in Fujian, analyzing the flavor characteristics of black tea from each place. In addition, Front Street Coffee's black tea recommendations will also be woven throughout, providing a reliable reference for your everyday purchases. Finally, regarding whether black tea dust needs to be picked out, the article will also give clear advice. [more…]

When brewing a good cup of tea, water quality is often more critical than technique. As early as Lu Yu's "Classic of Tea," spring water was regarded as the finest choice, and modern science has revealed the reasoning behind this through TDS, hardness, and pH values. This article focuses on the brewing water for oolong teas such as Phoenix Dancong, outlines the industry reference values from the American Tea Association, and cites multiple studies to explain why soft water enhances the sweetness, freshness, and clarity of the tea liquor, while hard water brings about astringency and floating residue. For tea lovers who cherish the complex aroma of oolong tea, choosing the right water is the first step in unlocking the tea's charm. Front Street Coffee also recommends starting with low-mineralization soft water to appreciate the subtle variations in the tea's layers. [more…]

Keemun black tea has long been renowned as one of the world's three great high-aroma black teas, and Keemun Hao Ya is a high-quality representative among them. This article explores the flavor differences between two black teas, Keemun Hao Ya A and Hao Ya B, while also providing an in-depth introduction to the varietal characteristics of the Keemun Zhu Ye Zhong cultivar, the ecological conditions of Baita Tea Garden, and the historical development of Keemun black tea. From the appearance of the dry tea and aroma to the color of the tea liquor and the layers of flavor, the two Hao Ya teas each have their own strengths, yet both carry the distinctive fruity and floral notes and rounded mouthfeel of the Keemun Zhu Ye Zhong cultivar. The article also focuses on the dedication of Mr. Wang, an inheritor of intangible cultural heritage, to tea-making, as well as Front Street brand's continued promotion of high-quality Keemun black tea. Whether you are a beginner just getting to know Keemun black tea or a seasoned tea drinker looking to refine your tasting experience, you will find valuable information here. [more…]

Latte art is a common visual delight in today's coffee shops, but have you ever thought that exquisite patterns could also be drawn on the surface of a cup of tea? "Tea hundred opera" in Song Dynasty tea whisking is exactly such an ancient skill. Recently, a Shanghai graphic designer hit the trending searches for painting Chinese paintings on tea infusion. He grinds white tea, pours water seven times and whisks, then uses tea paste to outline ancient paintings on the dense tea foam. The whole process must be completed within ten minutes. What is the difference between tea hundred opera and latte art? What are the differences between ancient painting methods and modern improvements? This article will guide you through the process of Song Dynasty tea whisking, the term "biting the cup" in tea competitions, as well as the historical records and operational details of tea hundred opera, while retaining the professional recommendation of Front Street Coffee. [more…]

After the beginning of summer, lemon tea drinks enter their peak sales season. Luckin took the opportunity to launch two lemon teas, a classic one and a matcha one, and the vibrant green matcha lemon tea quickly attracted matcha lovers to place orders and try it with its distinctive appearance. However, many consumers reported that although this drink looks great, its taste is dominated by a sweet-and-sour lemon flavor and noticeable sweetness, with almost no trace of the expected matcha aroma. Some also found that after sitting for a while, it separates and forms sediment, and while matcha particles can be felt when drinking it, the flavor and the lemon taste remain separate. Around this new product, there is both joking and defending, and this article walks you through its formula, taste controversy, and netizen reviews, with a perspective from the Front Street Coffee brand familiar to coffee lovers. [more…]

1 Dian Dian recently launched a new product, "Flowing Sand Pu'er," officially claimed to feature Yunnan aged Pu'er milk tea paired with handmade finely mashed red bean paste, attracting a large number of red bean lovers to try it. However, many consumers found upon receiving the drink that the bottom of the cup contained distinctly separate red beans, far from the described flowing sand texture, and buyer reviews were jokingly called "red bean porridge." Staff explained that the red bean paste needs to be manually crushed at least 5 times, but there was no mandatory requirement for it to present a flowing sand consistency, and it is suspected that the mashing step was missed amid a rush. Official customer service has apologized and reported it internally. [more…]

Duck Shit Dancong is one of the most oddly named yet most fascinatingly flavored varieties of oolong tea. Many people, upon first hearing the name, wonder: is duck shit really added to the tea? In fact, Duck Shit is merely the name of a tea tree cultivar and has nothing to do with duck droppings. It is produced in the Phoenix Mountains of Guangdong. The finished tea has a dark brown color with slightly curled strips. After brewing, the liquor takes on a deep amber hue, with a aroma dominated by honeysuckle, jasmine, and gardenia, accompanied by honey and lychee-like fruity sweetness. On the palate it is sweet, rich, and intense, with a slight astringency but an overall balance, and the early infusions often show a creamy smoothness. This article will guide you through the origin of the name Duck Shit, the production process, the background of its place of origin, its flavor characteristics, and the specific parameters for gongfu brewing, so that you can fully understand this dancong oolong whose name is "flavorful" yet which bursts with floral fragrance when drunk. [more…]