Anaerobic fermentation processing is a green bean processing technology that has attracted much attention in the coffee industry in recent years. Since Sasa Sestic, the 2015 WBC champion, brought it to the forefront, it has quickly swept through the specialty coffee world. Inspired by red wine-making techniques, this processing method injects carbon dioxide into a sealed container to expel oxygen, creating an oxygen-free environment that allows precise control of the fermentation process, giving coffee beans higher sweetness and more unique flavor layers. As processing technologies continue to evolve, experimental methods such as anaerobic natural, anaerobic washed, and double anaerobic have emerged one after another, each presenting distinctly different flavor expressions. This article will systematically sort out the principles and origins of anaerobic fermentation, and analyze one by one the process steps and flavor characteristics of these three common anaerobic processing methods, while also explaining them in conjunction with specific Front Street Coffee bean offerings. [more…]

Anaerobic Fermentation has been very popular in the coffee world in recent years, mainly because Sasa Sestic, the Australian competitor who won the 2015 WBC, started this trend, and even in 2018 WB [more…]

In recent years, the coffee consumer market has continued to expand, and various novel green bean processing methods have emerged one after another. The industry habitually refers to them collectively as special processing methods. These techniques give coffee a more diverse and distinctly individual flavor expression, and also bring richer layers of mouthfeel, thus winning the favor of a large number of enthusiasts. At present, the more mainstream special processing methods include anaerobic washed or natural, enzyme washed, lactic acid fermentation, and barrel-aged processing, among others. Among them, anaerobic fermentation has especially high exposure. This trend can be traced back to 2015, when the WBC World Barista Championship winner that year, Sasa Sestic from Australia, brought anaerobic fermentation processing into the public eye, and discussions around the fermented feel of coffee have not ceased to this day. This article will sort out the development of anaerobic processing, analyze the specific process of anaerobic natural, and introduce anaerobic-processed coffee beans such as Santa Vini currently sold by Front Street. [more…]

Cold brew coffee, with its refreshingly smooth texture and complex, layered flavors, has become a favorite among coffee lovers in summer. But when it comes to making and storing cold brew, many people still have questions: Does it need to be sealed after extraction is complete? Why does it give off a fermented aroma reminiscent of wine after sitting in the refrigerator overnight? Starting from the principles of low-temperature extraction, this article will analyze the oxidation process of cold brew coffee and the necessity of sealed fermentation, and share Front Street Coffee's cold brew parameters, detailed steps, and how to create a fruit-forward cold brew recipe through a two-bean blend, helping you make a cup of cold brew with full flavor and a pronounced sweet aftertaste. [more…]

Carbonic maceration processing, also known as the CM process, falls under the category of anaerobic processing. In 2015, Sasa won the World Barista Championship with this type of coffee bean, bringing this innovative technique into the public eye. The method was inspired by red wine making, achieving fermentation by injecting carbon dioxide into a sealed stainless steel tank. The CM process has two versions, natural and washed, differing in the material fermented inside the tank. This article provides a detailed analysis of its flavor characteristics, processing flow, and key control parameters, along with related product recommendations from Front Street Coffee. [more…]

In recent years, red wine processing has attracted much attention in the specialty coffee world. Drawing on the fermentation control concepts used in winemaking, it intervenes in pH, temperature, humidity, and microbial conditions to give coffee beans a rich acidity and complex aroma reminiscent of red wine. This article will start with the flavor differences between lactic acid fermentation and acetic acid fermentation, outline the specific operational process of red wine processing, and combine it with the origin information of Front Street Colombia Red Wine Process—the eastern slopes of the Andes in Cundinamarca Department, a growing altitude of 1,800 to 2,000 meters, and the anaerobic fermentation practice of Remi Sultan in sealed metal containers—to provide coffee lovers with a complete set of flavor descriptions and grinding setting references. [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…]

Many coffee enthusiasts, when tasting ice drip coffee, are surprised by its faint, elusive notes of wine aroma and character, even wondering if alcohol has been added, or if the coffee beans themselves carry a wine-like flavor. In fact, this unique flavor does not come from any added ingredient, but is closely related to the special way ice drip coffee is made. Freshly dripped ice drip coffee is actually thin in flavor and can even taste astringent; it needs to undergo sealed low-temperature aging to become mellow and layered. This article, drawing on Front Street Coffee's practical experience, will analyze the principles behind how the wine-like flavor of ice drip coffee forms, explain how low-temperature extraction inhibits bacterial growth, and why sealed refrigerated aging can produce a fermentation aroma similar to alcohol. It will also compare the uncontrollability of natural fermentation in hot-brewed coffee, helping readers understand how each step in making ice drip coffee affects the final flavor. [more…]

Coffee enthusiasts' taste demands are becoming increasingly refined. The original terroir flavors produced by traditional washed and natural processing methods can no longer satisfy diverse expectations, and various specialty processing methods have emerged as a result. From the perspective of Front Street, this article systematically reviews the principles and classifications of anaerobic fermentation processing, compares the differences between natural fermentation and temperature-controlled fermentation, and provides an in-depth analysis of three processing workflows: anaerobic natural, anaerobic washed, and anaerobic enzyme-washed. At the same time, using Front Street Huayueye coffee beans from the Huila region of Colombia and Rose Valley coffee beans from Big Tree Estate as examples, it presents a complete approach from green bean processing to roasting curve selection, and then to pour-over parameter development, helping readers understand how specialty processing methods shape the flavors in the cup. [more…]

Geisha coffee has attracted much attention ever since it won the Panama BOP competition in 2004, and its delicate floral aroma and citrus-honey sweetness have captivated countless enthusiasts. This article focuses on Front Street Panama Geisha, first introducing the terroir advantages of the two major producing regions, Boquete and Volcán, then focusing on the grade classification and flavor performance of Hacienda La Esmeralda Red Label Geisha, and finally providing an in-depth analysis of Finca Deborah's anaerobic fermentation natural process—from high-altitude low-temperature slow ripening to 36 hours of sealed fermentation, dissecting layer by layer why this Geisha can present extremely sweet fruit and floral notes. Whether you are trying it for the first time or are a seasoned enthusiast, you can find clear guidance here for getting started with Geisha. [more…]

Colombia, as the world's third-largest coffee-producing country, has always attracted much attention for its specialty coffee. This article focuses on a Colombian Huila region Finca Astorga Flor de Noche coffee bean launched by the Front Street Coffee brand, and provides an in-depth analysis of the anaerobic natural processing method it uses—from 15 to 20 days of fermentation with carbon dioxide in sealed tanks, to sun-drying until the moisture content reaches 11%, followed by dehulling and screening in a complete process. This bean uses the Caturra variety, with bright fruity acidity and a light sweetness. It smells of fermented floral aromas, and on the palate it presents a sweet-and-sour experience like strawberry jam. The article will introduce the processing technique, flavor characteristics, and suitable audience in detail, providing a reference for coffee lovers. [more…]

In recent years, anaerobic fermentation and red wine processing methods have continued to gain popularity in the specialty coffee world. From the promotion by 2015 WBC champion Sasa Sestic to the early explorations of Costa Rican coffee farmers, these processing techniques, which draw on winemaking ideas, have brought coffee rich flavors such as strawberry jam, fermented wine aromas, and tropical fruits. This article systematically reviews the scientific principles of anaerobic fermentation, its essential differences from traditional processing methods, and the specific operational workflow of carbonic maceration. It also combines two representative beans from Front Street Coffee—Colombia Flower Moon Night and Panama Hartmann—to share roasting and brewing parameters, helping coffee lovers gain a deeper understanding of the core logic of this special processing method. [more…]

As soon as summer arrives, for coffee lovers, nothing is better than a refreshingly icy cold coffee. If you reject high calories, care about mouthfeel and lingering finish, and love to explore and try new things, in summer you can try the goddess-level drinks in the iced coffee world, "Ice Drip Coffee" and "Cold Brew( [more…]

Cold brew coffee takes a long time to make, so it is often available only in limited quantities at cafés. It originated in Europe and is said to have been invented by the Dutch, which is why it is also called Dutch Coffee. During preparation, ice water seeps through the coffee grounds by dripping naturally, eventually flowing drop by drop into the lower pot, so it is also known as water-drip coffee, and the whole process usually takes more than 8 hours. This article will introduce the steps for making cold brew coffee in detail, including the key aspects of the coffee-to-water-to-ice ratio, grind size selection, filter paper placement, and drip rate control, while also answering common questions about cold brew coffee fermentation time and the best drinking period. The article also uses Front Street Strawberry Candy coffee beans as an example for a practical demonstration and explains the effect of low-temperature refrigeration "aging" on flavor, as well as why it is recommended to drink it within 5 days. [more…]

Cold brew coffee, with its clean, mellow body and unique fermented aroma, has become a favorite among many coffee lovers during hot weather. But not all coffee beans are suited to making cold brew—bean selection, grind size, Brew time, and resting time all directly affect the final flavor. This article begins with Front Street's cold brew reservation rules, explaining in detail why cold brew needs to be ordered two days in advance, why freshly brewed coffee liquid must be sealed and refrigerated to rest, and the drinking window and safe storage recommendations for cold brew. It then highlights four coffee beans that Front Street commonly uses for cold brew—Ethiopia Flower, Kenya Little Tomato, Costa Rica Strawberry Candy Geisha Blend, and Honduras Sherry—introducing each one's origin background, processing method, and cold brew flavor performance, to help readers find the beans that suit their own taste. [more…]

On the stages of the 2023 WBC finals and the WBrC in Chicago, a Colombian coffee variety named "Ombligon" appeared frequently, drawing industry attention. It comes from Finca El Diviso in the Huila region; its fruit resembles a papaya with a small ring at the bottom, and its name derives precisely from this. Genetic research shows it is related to Ethiopian landraces, yet it is a unique variety formed through natural mutation in Colombia. Finca El Diviso has tailored a processing protocol for Ombligon that includes hot-water flotation, sealed fermentation, and sugar-solution-activated yeast—known in the industry as "thermal shock fermentation"—allowing this bean to display layered fruit flavors reminiscent of grapes, oranges, blueberries, and pineapple juice. In this article, Front Street Coffee will guide you through a comprehensive understanding of Ombligon's varietal characteristics, estate background, processing details, and pour-over recommendations. [more…]

In recent years, an increasing number of specialty green coffee beans processed with special processing methods have appeared on the specialty coffee market. Is this really something to be happy about? Front Street Coffee believes that special processing methods were originally intended to give the flavor of coffee beans from a certain producing region more distinctiveness. However, as their use has continued to expand, some processing methods today seem to be more about masking the defects of the coffee beans themselves and then selling them at a high price. In fact, all special processing methods have evolved around the three traditional methods: washed, natural, and honey. This article will systematically sort out the most common types of special processing methods on the market, including anaerobic fermentation, barrel fermentation, and red wine processing, and, combined with Front Street Coffee's cupping experience and specific products, analyze their processing procedures and flavor characteristics. [more…]

Some may think that cold brew coffee is simply coffee grounds soaked in cold water for a long time. Actually, that's not the case! A delicious cold brew coffee involves more than just these parts to consider; it also requires attention to some small details to assist our extraction. But as long as we do it right, we can easily brew it with just a few steps. [more…]

Yirgacheffe is one of Ethiopia's most renowned specialty coffee regions, and the Worka Cooperative is a representative producer within it, famous for its natural-process beans. This article will start from the overall landscape of Ethiopia's nine major coffee regions, outline the administrative scope and flavor standing of the Yirgacheffe region, and then focus on the founding background of the Worka Cooperative and its membership in the YCFCU alliance. At the same time, the article will break down in detail the technical principles of the anaerobic natural process—from the carbonic maceration inspiration drawn from red wine-making, to the effect of oxygen-free fermentation in sealed metal tanks on the sugars and acidity of coffee beans—and finally arrive at the strawberry, magnolia, and small Taiwan mango flavors presented by Front Street Coffee's Yirgacheffe Worka coffee beans, providing coffee lovers with a complete guide to understanding the region and the processing method. [more…]

Ice drip coffee, through its pure ice drip filtration and low-temperature fermentation process, presents a mellow, sweet, and refreshingly cool taste, making it a highly favored coffee beverage in summer. Starting from the store practices of Front Street Coffee, this article systematically sorts out the differences between the two common methods of low-temperature extraction—cold brew and ice drip—and explains in detail the structure of the ice drip pot, the choice of grind size, the control of drip speed and coffee-to-water ratio, as well as the grasp of refrigeration fermentation duration. At the same time, focusing on the two major directions of refreshing floral and fruity notes and rich fruity tea notes, it recommends two coffee beans suitable for making ice drip coffee, Front Street Elida Estate Catuai and Front Street Natural Huakui, helping enthusiasts recreate at home a clean-flavored, richly layered ice drip coffee. [more…]