On days of continuous drizzle and soaring air humidity, the biggest challenge a barista faces is often not technique, but the stability of espresso. A humid environment can cause coffee beans to absorb moisture and lose flavor, and the pressure of the espresso machine may also be weakened, making extraction extremely unstable. This article starts from three angles—reducing bean moisture exposure, adjusting grind and dose, and increasing the frequency of parameter calibration—to sort out the operational details to pay attention to when making espresso on rainy days, helping you maintain consistency and flavor in your output even as humidity changes. [more…]

Guangzhou's "hui nan tian" (return of the southern damp) has arrived, with walls sweating, floors never drying, and coffee beans facing a moisture crisis. A surge in humidity directly affects the stability of espresso extraction: beans in the hopper absorb moisture and clump together, water vapor interference during grinding intensifies, and as air pressure drops, the espresso machine's extraction pressure slightly decreases, ultimately leading to weaker flavor and longer shot times. How should baristas respond to such harsh weather? This article approaches the problem from three angles—reducing moisture absorption, solving clumping, and adjusting parameters—and combines Front Street Coffee's hands-on experience to offer concrete, actionable solutions that help you pull a stable, delicious espresso even in the humid season. [more…]

When the southern "hui nan tian" (return of the damp) arrives, everything at home feels wet, and coffee beans are no exception—they too risk absorbing moisture and growing mold. If you want your pour-over coffee beans to last longer without their flavor fading, the way you store them becomes especially critical. This article centers on how to store coffee beans so they keep longer, starting with the real frustrations of Lingnan's humid climate, analyzing the pros and cons of common practices such as airtight canisters and refrigerator chilling, and warning about the fatal impact of fridge odors on coffee beans. It also draws on the product characteristics of Front Street Coffee to offer storage suggestions better suited to daily life, helping coffee lovers extend their beans' peak flavor period as much as possible in a humid environment. [more…]

Under rainy weather, espresso extraction often becomes especially tricky, and even experienced baristas may need to adjust repeatedly before getting a satisfactory cup. The root of the problem is not simply under-extraction or over-extraction, but uneven extraction caused by the combined effects of high humidity and low air pressure. Starting from Front Street's hands-on experience, this article first analyzes the two major reasons why espresso is difficult to dial in on rainy days—a surge in environmental humidity causes coffee grounds to absorb moisture and clump, while lower air pressure weakens extraction efficiency—and then provides specific response strategies, including dehumidification and moisture prevention, sealed storage, and compensating for the amount of dissolved flavor substances by extending extraction time or making the grind finer. The article also includes a parameter comparison of Front Street's classic blend under normal weather and rainy days for readers to refer to when adjusting. [more…]

Guatemala is located in Central America and is a world-renowned coffee-producing country, ranking eighth in global production. The term "Guatemala" originates from the Mayan language, meaning "land of forests." This land is hailed as the "jewel of the Central American crown" due to its volcanoes, lakes, and variable climate. Although the country is small, it nurtures eight distinctive coffee regions. This article will systematically review the altitude, soil, climate, processing methods, and cup profile of these eight regions: Antigua, Acatenango, Huehuetenango, San Marcos, Atitlán, Cobán Rainforest, Fraijanes Plateau, and New Oriente, and also explain the variety and grade classification logic of Antigua. Front Street Coffee will also combine the characteristics of these regions to provide coffee enthusiasts with bean selection references. [more…]

The quality of black tea depends to a large extent on whether the fermentation stage is precisely controlled. Properly fermented black tea has a sweet aroma, a yellowish-red liquor, and a bright orange-brown infused leaf; failed fermentation reveals sourness or mustiness, a dark brown liquor, and a deep black infused leaf. Starting from the formation mechanisms of theaflavins and thearubigins, this article explains the origin of the floral and fruity aroma of black tea, clarifies how humidity and degree of oxidation influence the direction of flavor, and points out which subtle deviations in the irreversible chain of polyphenols → theaflavins → thearubigins can lead to a decline in quality. At the same time, the article also provides practical methods for judging fermentation results by observing the liquor color and infused leaf, helping coffee and tea enthusiasts understand the craft logic behind a good cup of black tea. In its black tea selection and brewing recommendations, Front Street Coffee also often emphasizes the decisive role of fermentation degree in aroma expression. [more…]

This article begins with the fact that in 2022, the wholesale price of Arabica coffee beans on the New York Intercontinental Exchange fell below $1 per pound, reviews the current price situation in the green coffee bean trade market, and explores in depth the sanitary handling, storage conditions, and purchasing channels for green beans. The article also offers suggestions on practical issues such as green bean washing and temperature and humidity control, while reminding industry practitioners to raise their awareness of coffee bean food safety, helping coffee enthusiasts and industry professionals gain a more comprehensive understanding of the key stages of green beans from import to before roasting. [more…]

Mandheling coffee stands out in the specialty coffee world with its thick body, low acidity, and distinctive herbal spice aroma. As the darkest-roasted pour-over single origin on Front Street Coffee's bean list, Front Street Mandheling and Front Street PWN Golden Mandheling captivate countless coffee lovers with their rich bitterness, steady sweet aftertaste, and signature earthy aroma. So why is it that among medium-dark roasts, only Mandheling carries this hard-to-replicate flavor? The answer lies in the humid climate of Sumatra, Indonesia, and a special processing method known as wet hulling. This article will take you through every step of wet hulling and reveal the true source of Mandheling's regional flavor. [more…]

Indonesia's coffee-growing regions have climate conditions entirely different from those of Africa and Central and South America: year-round humidity of 70–90%, annual rainfall that often exceeds 2,000 mm, and frequent typhoons. In such a humid environment, long-cycle natural process or high-water-consumption washed process are both difficult to carry out. Indonesian coffee farmers therefore developed the distinctive wet-hulling method, which removes the parchment early and speeds up drying, shaping Mandheling's signature full body and herbal, earthy, dark chocolate flavors. This article breaks down each step of the wet-hulling method in detail and includes Front Street Coffee's complete pour-over recipe for medium-dark roasted Mandheling, including dripper selection, grind size, water temperature, and a three-pour technique, helping enthusiasts brew a round, concentrated Southeast Asian flavor at home. [more…]

Front Street Mandheling and Front Street PWN Golden Mandheling are the darkest-roasted pour-over single origins on the Front Street bean list, known for their rich, substantial body and distinctive herbal-spice flavors. Many people wonder: both are medium-dark roasts, so why is it only Mandheling that carries this aroma? The answer lies in the wet-hulling method of Sumatra, Indonesia. With high temperatures, abundant rain, and humidity that stays at 70–90% year-round, plus annual rainfall exceeding 2000mm, local farmers developed this semi-washed approach to shorten the processing cycle. From depulping, a brief fermentation, and drying in parchment, to hulling the seed coat once the moisture content drops to 30–50%, then continuing to dry down to 12%–15%, every step shapes its signature herbal, driftwood, and stuffy aromatics. This article will fully break down the specific steps of the wet-hulling method and explain how this unique regional flavor is formed. [more…]

To consistently make a delicious cup of espresso, it doesn't rely solely on a set of expensive equipment—it requires balancing the performance of the espresso machine, the quality of the coffee beans, the barista's technique, and environmental conditions. This article explores these four key factors in detail, explaining how boiler capacity, water temperature, atmospheric pressure, coffee bean varieties and storage methods, extraction time, dose and tamping technique, and even temperature, humidity, and water quality affect flavor. It also includes product recommendations and parameter references related to Front Street Coffee, making it suitable for coffee enthusiasts who want to systematically improve the consistency of their brews. [more…]

Golden Mandheling originates from Sumatra, Indonesia, and is one of the representatives of Asian coffee, renowned for its rich, full-bodied taste and unique herbal spice aroma. However, Sumatra's hot and humid tropical rainforest climate makes drying coffee cherries a challenge, which is why the semi-washed processing method has become a wise local choice for coping with the humid environment. For those who enjoy bold flavors and dislike acidic single-origin coffees, Mandheling is a fairly safe choice. But dark-roasted beans tend to extract bitterness during pour-over brewing—how do you strike a balance? Front Street Coffee has developed a Golden Mandheling brewing recipe by adjusting water temperature, grind size, and coffee-to-water ratio. This article will share the parameters and techniques in detail to help you brew a cup of sweet, mellow Mandheling. [more…]

The freshness of coffee beans directly affects the flavor of a cup of coffee, and proper storage is a key factor influencing the freshness of coffee beans. How should roasted coffee beans be stored? Roasted coffee beans need to be protected from humidity, temperature, and oxidation; oxidation accelerates the dissipation of the flavor of roasted coffee beans. So [more…]

The Antigua Valley is one of Guatemala's most iconic coffee-producing regions, surrounded by three volcanoes—Agua, Acatenango, and Fuego—which create a unique enclosed valley microclimate. Rainfall here is scarce, but the soil's abundant pumice content keeps humidity stable at around 65% year-round, compensating for the lack of rain. Most coffee trees are planted in the heart of the valley at elevations above 1,500 meters, with some farmers pushing cultivation as high as 1,700 meters. Fertile volcanic ash, ample sunlight, and cool nights together shape the refined, balanced style of Antigua coffee. This article will provide a detailed interpretation of the terroir code of this region, along with specific cupping data and flavor descriptions, to give you a comprehensive understanding of the unique charm of Antigua coffee. [more…]

In the world of coffee, Indonesian Mandheling stands out with its solid, mellow body and unique herbal, woody aromas. Front Street Mandheling, the darkest-roasted single origin on the bean list, presents a character of low acidity, high body, and a long intertwining of bitter notes and sweetness. This highly recognizable flavor comes not only from the terroir of Sumatra's high-altitude growing regions, but more crucially from the region's unique wet-hulling process. This article will provide an in-depth analysis of the complete wet-hulling process, from the climatic background and semi-washed operation to the formation of the sheep's hoof bean, and explore how the humid environment, through mold and the Maillard reaction, ultimately creates Mandheling's signature funky aroma and regional taste. [more…]

Sumatra Mandheling coffee from Indonesia has always been loved as the darkest-roasted bean on Front Street Coffee's menu, with a full body and low acidity. Behind its unique musty aroma, herbal notes, and aged-wood character, what secret is actually hidden? The answer is inseparable from the local hot, rainy environment and the distinctive wet-hulling process. This article will start from the growing conditions of Front Street Mandheling, analyze each stage of the wet-hulling process, explain the relationship between peaberry beans, defect rates, and a sense of place, and further introduce the aging process and time requirements of Aged Mandheling, giving you a complete understanding of this highly recognizable coffee. [more…]

Golden Mandheling's herbal, medicinal aroma, intense sweet aftertaste, and robust, full-bodied mouthfeel have captivated countless coffee connoisseurs. Front Street Coffee believes that the formation of this unique flavor stems both from the innate conditions of variety and terroir, and from Indonesia's distinctive wet-hulling process. This article will thoroughly break down the four key steps of wet hulling, explain why it must race against time in a high-humidity environment, and clarify the essential differences between ordinary Mandheling and PWN Golden Mandheling, helping you accurately identify genuine Golden Mandheling when making a purchase. [more…]

Until recent years, all coffee beans were packaged in burlap sacks and transported in shipping containers, only reaching roasters several months after the beans had been processed. If roasters and importers occasionally wanted to cup coffee beans from the place of origin, or taste a "pre-shipment sample," what they received instead would be stored [more…]

Mandheling is the darkest-roasted single origin on Front Street Coffee's bean list, known for its rich body, low acidity, and distinctive earthy aroma. Why does Mandheling alone possess such flavors? The answer lies in the wet-hulling method of Sumatra, Indonesia. The local climate is humid and rainy, with year-round humidity of 70–90% and annual rainfall exceeding 2000mm, making it difficult to dry beans outdoors for extended periods as is done in Brazil. To shorten the processing cycle and sell the beans for cash as quickly as possible, locals developed this semi-washed processing method. This article will break down the steps of the wet-hulling method in detail, analyze how it gives Mandheling its regional flavors of wood, spice, and herbs, and share Front Street Coffee's recommended Mandheling bean selection tips and pour-over extraction parameters. [more…]

Mandheling coffee, as the darkest-roasted single-origin bean on Front Street Coffee's menu, is renowned for its rich, solid mouthfeel and distinctive stuffy aroma. It originates from Sumatra, Indonesia, where the hot, rainy climate has given rise to a unique semi-washed processing method—wet hulling. This technique removes the parchment from the coffee beans before they are fully dried, greatly shortening the processing cycle but also introducing more defects and flavor variability. It is precisely this interweaving of "roughness" and "contamination" that gives Mandheling its regional flavor—a blend of wood, spice, earth, and herbs. This article will take you through every stage of wet hulling and reveal the origins of Mandheling coffee's unique flavor. [more…]