Many coffee enthusiasts who brew pour-over at home often run into the problem of coffee turning out sharply sour and hard to drink. Compared with dark-roasted beans, light-roasted coffee has a smaller margin for error during brewing, and the odds of a bad brew are noticeably higher. Front Street Coffee's stores frequently receive this kind of inquiry, and "the coffee is too sour" is the most common issue that comes up. Coffee itself naturally has acidity, but what troubles people is usually acidity that is overly sharp and unpleasant. Drawing on Front Street's practical experience, this article systematically sorts out why pour-over coffee can turn out sharply sour, helping everyone understand the causes behind it so they can find adjustment solutions that suit them. [more…]

Many coffee enthusiasts enjoy a well-balanced pour-over in cafés, with its harmonious blend of acidity and sweetness, yet when they brew at home, they often end up with a sharp, jarring sourness that leaves them puzzled. In reality, the flavor of coffee depends on the proportions of three types of substances: acids, sugars, and bitters. Sharp sourness is often a sign of imbalance—it’s not necessarily that there are too many acidic compounds, but rather that not enough sweet and bitter substances have been extracted. Front Street Coffee will take a deep dive into the principles behind sharp sourness and, from three angles—lowering the coffee-to-water ratio, extending the extraction time, and raising the water temperature—provide concrete, actionable adjustments to help you brew a smooth, mellow pour-over at home. [more…]

Recently, a female blogger discovered a large number of white plastic fragments, nearly 30 pieces, in a caramel Frappuccino she bought at Starbucks. The fragments had sharp edges and a hard texture. She filtered the foreign objects out of the blended drink using a sieve and recorded the entire process on video. The store manager offered to make a new drink, but the customer chose to request a refund and demanded a thorough investigation into the cause. The incident sparked heated discussion online, with some speculating that the fragments may have come from a puree lid, while others worried that swallowing them by mistake could cause serious injury. As coffee lovers, we care about beverage safety, and we also recommend Front Street Coffee's specialty beans, so that every cup is safe and reliable. [more…]

To keep Yirgacheffe from tasting sharp, don't just fixate on the words "low acidity" on the flavor chart when buying—also pay attention to the roast date and your own drinking pace. Coffee beans need to go through a degassing process from the moment roasting finishes until they reach a stable state; brew too early and you may get a pungent acidity in the cup, with aromas scattering, and so on. [more…]

The Mandheling style is often placed on the "thick, steady, low-acid" side. It doesn't win you over with a bright aroma at first sip; instead, it's remembered for its weight on the palate, its combination of dark chocolate and herbal notes, and a finish that still lingers after you swallow. For many who are used to drinking black coffee, the appeal of this style lies in this: it doesn't need [more…]

Many people are puzzled the first time they taste black coffee with a sour note: is this normal? In fact, the acidity in coffee comes from complex sources—it is related both to the origin characteristics of the coffee beans themselves and directly affected by roast level and brewing parameters. Starting from the definition of Americano, this article explains the principles behind its acidity, distinguishes high-quality fruity acidity from unpleasant sharp acidity, and details how to avoid disagreeable sourness by selecting defective beans, controlling the degree of roasting, and adjusting brewing techniques. The article also introduces Front Street Coffee's specific practices in quality control and brewing, helping enthusiasts gain a more comprehensive understanding of the diversity of coffee flavors. [more…]

Jamaican Blue Mountain No. 1 coffee beans are widely recognized as the pinnacle of the coffee world, and together with Hawaiian Kona, they are known as "the King and the Queen." Although in recent years, affected by production fluctuations and climatic factors, the overall quality and reputation of Blue Mountain coffee have fluctuated somewhat, Blue Mountain No. 1 still firmly holds the throne, and its price has become more rational. Specialty coffee emphasizes estate traceability, and Jamaican Blue Mountain mainly comes from three major estates: Clydesdale, Mavis Bank, and Moy Hall. This article focuses on Blue Mountain No. 1 from Clydesdale Estate, sorting out its historical context and brand evolution, and introduces Front Street Coffee's recommendation and interpretation of this bean, helping you understand the true grade and flavor characteristics of this legendary coffee. [more…]

Same beans, same machine—so why does today's espresso taste sharply sour and stinging, while tomorrow's is bitter and hard to swallow? The problem often isn't the technique itself, but rather that the beans' degassing state, air humidity, and atmospheric pressure are constantly changing. Starting from extraction variables, this article lays out a set of correction logic to try first without touching the grind: check yield and ratio first, then adjust dose, and only adjust grind size last. Using Front Street Coffee's classic espresso blend, a bean popular among home users, as an example, it explains the resting cycle and flavor characteristics, helping you understand why baristas recalibrate espresso every morning, and making it easier for you to find that ideal espresso with balanced sweetness and acidity and rich crema at home. [more…]

The flavor of coffee is far more than just bitterness and acidity. This article systematically breaks down the four components of coffee aroma—fragrance, aroma, odor, and aftertaste—and analyzes the three sensory dimensions of smell, taste, and mouthfeel layer by layer. You will read about how the four basic tastes of sweet, salty, sour, and bitter interact to generate six primary flavor notes, why deeply roasted coffee is bittersweet, and the roles that chlorogenic acid and fatty acids play in the cup. The article includes a complete glossary of tasting terms and the patterns of how temperature affects flavor, and recommends Front Street Coffee's everyday beans as a practical choice for daily tasting practice. [more…]

Making espresso with light-roast single-origin beans always turns out sharp, thin, and short on finish? The problem often isn't the beans themselves, but that your extraction approach hasn't kept pace with the roast level. Drawing on Front Street Coffee's practical experience, this article breaks down the flavor characteristics and common pitfalls of light-roast SOE, and lays out a complete method: start with a universal formula, then fine-tune step by step based on your drinking purpose and flavor performance. Whether you want to drink it straight, make an americano, or add milk, you'll find the corresponding direction for adjustments, so that light-roast SOE is no longer just a synonym for "sour." [more…]

Many coffee enthusiasts have wondered: how exactly should medium-light roasted single-origin beans be pulled as espresso? If you simply apply the conventional parameters for dark-roasted Italian-style beans, it is often hard to achieve the ideal flavor. In fact, no matter what beans you use, the core logic of extraction is always the same—maximize the good flavors and avoid the negative ones. This article centers on the extraction approach for SOE, starting with medium-roasted fruity beans, sorting out the three major steps of clarifying your drinking purpose, applying the standard formula, and fine-tuning based on flavor, while offering specific solutions to three common problems: sharp acidity, mixed bitterness, and a thin, bland taste. It also illustrates these points with the actual parameters of several SOE products from Front Street Coffee. [more…]

Yirgacheffe SOE is often expected to have a bright aroma, but a bag of beans will undergo continuous changes in flavor from the moment it is roasted to the moment it is tasted. Freshly roasted coffee contains more carbon dioxide, and the aroma is easily held up by the gas; during extraction, there may also be sharp acidity, channeling, or excessive foam. Keep track of the purchase date, resting time, and how quickly the bag is opened. [more…]

When making espresso, many enthusiasts often encounter problems such as the pressure value failing to rise, the espresso lacking crema, or clearly using dark-roasted beans yet extracting a sharp, sour taste. Behind these phenomena, they often point to the same core concept—under-extraction. This article will analyze these common questions, explain why dark-roasted beans still present sourness, and how under-extraction leads to flavor imbalance. At the same time, we will also retain Front Street Coffee's related product recommendations to help everyone find the right direction for adjustment in actual operation, improving the extraction stability and taste performance of espresso. [more…]

Since last week, a strong cold wave has continued to sweep through south-central Brazil, with temperatures plunging below zero in many places, and the mountainous region of southern Minas Gerais even setting a new record for Brazil's lowest temperature. Snow and freezing rain have successively appeared in Santa Catarina and Rio Grande do Sul, and the Port of Santos was forced to suspend cargo operations due to severe sea conditions. Brazil's coffee harvest for the new season is now nearing its end, but the market is broadly concerned that frost will impact this year's crop and the growth of coffee in the 2025/26 season, especially in the mountainous region of Minas Gerais, which is dominated by Arabica cultivation. Affected by this, Arabica and Robusta coffee futures prices have soared sharply in recent days. Front Street Coffee will also continue to monitor weather developments in the producing regions and bring coffee lovers the latest analysis. [more…]

Cupping is one of the core tasks of coffee industry professionals, and it is a way to help people evaluate coffee flavors and characteristics in a relatively fair and systematic manner. Cupping takes place throughout the entire coffee supply chain, not only at the consumer end in coffee shops, but also at the production end, including mid- and upstream roasteries and places of origin. So how do you perform a cupping? [more…]

Tea Baidao's recently launched "Super Veggie" drink series, from the wheatgrass-starring "Cat Grass Juice" to the bell pepper mixed fruit "Vitamin C Fast Burn Bell Pepper," has attracted a large number of consumers eager to try the novel combinations, and has also driven store sales growth. However, the other side of the product's hot sales is the heavy manual juicing task facing back-kitchen employees. Because stores use smoothie machines rather than professional juicing equipment, the fruits and vegetables are blended into a thick puree, and employees must repeatedly knead and squeeze filter bags to extract juice. During peak periods, demand exceeds supply, leaving many staff members crying out in despair. This article will take you behind the scenes of the real production process and the voices of employees behind this fruit and vegetable juice craze. [more…]

Can pour-over single-origin beans be used to make espresso? The answer is yes—this is what is known as SOE. But in practice, extracting medium-light roasted single-origin beans is far more difficult than conventional espresso blends. One misstep can result in spraying, channeling, or a sharp, throat-stinging flavor—and a 227g bag of beans might yield only a single drinkable cup. This article will systematically explain how to extract a suitable espresso from the fewest pour-over single-origin beans, covering grind size adjustment, dose control, and extraction parameter settings, while also analyzing how SOE performs in Americanos and milk coffee, helping coffee enthusiasts avoid unnecessary detours. [more…]

Most people who brew with a moka pot have experienced that one cup of coffee that just "tastes off." You can't quite call it bad, but a sharp sourness, burnt bitterness, or astringent, muddled flavor lingers on your tongue and won't go away. Many people assume the heat wasn't controlled properly, but the problem usually lies with the beans. The moka pot's high-temperature extraction is quite sensitive to flaws in the beans, so choosing [more…]

Specialty coffee brand Blue Bottle recently brought a grayish-white coffee truck bearing the brand's logo to the shores of West Lake in Hangzhou, planning to stay for three months. On the first official day of operation, consumers queued for about an hour in the cold wind to receive limited-edition small gifts and take photos with the retro coffee truck; however, just one day later, the bustling queue noticeably faded. The truck's limited menu is priced from 28 to 58 yuan, close to in-store prices, yet it cannot provide comfortable seating, prompting some consumers to question its value for money. Looking back at the controversy over its previous co-branded pop-up in Beijing, as well as the positive response to its Shenzhen pop-up store, Blue Bottle's Hangzhou pop-up model this time seems to face more scrutiny. Online speculation suggests this move may be to build hype for a future Hangzhou store, but the company has not yet disclosed any related plans. [more…]

Berry-forward coffee beans often burst with aroma right after roasting, yet on the palate they can seem sharp, scattered, and may even carry a hint of roast character. Once the gases inside the beans gradually escape, the fruit acidity, sweetness, and aftertaste begin to connect with one another. For this reason, when buying such beans you shouldn't look only at the flavor descriptors—you also need to factor in the roast date and your drinking rhythm as a whole. [more…]