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…]

Anaerobic coffee has been appearing on coffee bean lists frequently in recent years. Although many people have tried it, they only have a vague understanding of its specific process, and some even develop an aversion to it due to unfamiliarity. In fact, anaerobic processing is not as complicated as imagined. In most cases, it simply adds an extra anaerobic fermentation step before traditional natural or washed processing. The depth of fermentation is precisely the key that determines the direction of coffee flavor. From the perspective of Front Street, this article sorts out the basic principles of anaerobic processing, common methods, and their connection with traditional processing. Combined with three specific beans, it helps readers understand the flavor differences brought by different anaerobic treatments, so they can find the cup that suits their taste. [more…]

In recent years, any coffee processing method that claims to be innovative seems unable to avoid the word "anaerobic." In fact, the principle of anaerobic processing is not complicated: whether fresh cherries are put into stainless steel tanks with one-way valves or sealed in bags with the air expelled, an oxygen-free environment can be achieved. The real difficulty lies in precisely controlling the degree of fermentation, not in the technique itself. As oxygen is gradually replaced by carbon dioxide, fermentation at a certain stage produces flavors reminiscent of stone fruit and peach. This discovery quickly triggered imitation across major producing regions worldwide, and anaerobic processing thus became popular. In addition to its signature flavors, anaerobic processing can also give coffee a dense mouthfeel and a sweeter aroma. This article will take several Colombian specialty coffees on Front Street Coffee's bean list as examples to specifically compare the taste differences brought by anaerobic natural and anaerobic washed processing. [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…]

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…]

As coffee enthusiasts deepen their understanding of coffee, more and more people are paying attention to coffee bean processing methods. As a post-harvest processing method that has attracted much attention in recent years, anaerobic fermentation has brought more possibilities to coffee flavors. This article will analyze in detail the step-by-step processes and flavor and taste differences between anaerobic natural and anaerobic washed processing methods, and share Front Street Coffee's cupping and brewing experience. By comparing the characteristics of washed, natural, and anaerobic processing, it helps readers understand how different processing methods affect the final flavor of coffee. The two anaerobic natural beans, Huayueye and Monster Manor, launched by Front Street Coffee, will also be used as examples to demonstrate their unique charm. Whether you are a beginner or a seasoned enthusiast, you can gain practical references for purchasing and tasting. [more…]

In recent years, the processing method descriptions on coffee bean labels have become increasingly long, with various special processing methods, primarily anaerobic, emerging one after another. When many consumers drink anaerobically processed coffee with unique flavors, they wonder whether flavorings were added during roasting. This article sorts out the differences between anaerobic natural and anaerobic washed, explains why special processing methods are mostly led by well-funded estates, and cites the views of world champion Sasa to clarify the essential differences between flavored coffee and the addition of enzymes or yeast fermentation. It also answers questions such as whether anaerobic coffee is equivalent to flavored beans and whether it harms health, helping coffee lovers understand more transparently where the flavors in their cup come from. [more…]

Anaerobically processed coffee beans have always been a hot topic among enthusiasts—some are captivated by them, while others find the flavors too unconventional. Compared with traditional methods like natural and washed, the anaerobic fermentation process still feels unfamiliar to many, which makes it prone to misunderstanding and controversy. Today Front Street Coffee will talk about what anaerobic processing is, how it differs from natural and washed, and what characteristics anaerobically fermented coffee beans display. [more…]

While classic methods like washed, natural, and honey processing are already widely known, emerging techniques such as anaerobic, enzyme-assisted, and carbonic maceration are appearing one after another, opening up new possibilities for coffee flavor. These processing methods often give coffee beans a distinctive flavor profile, sparking curiosity about the principles and operations behind them. This article focuses on the key step of anaerobia, explaining how it builds upon traditional processing methods and, through the action of microorganisms in an oxygen-deprived environment, converts sugars into lactic acid, acetic acid, and aromatic compounds such as esters and aldehydes, thereby creating special experiences like yogurt-like acidity. The article also combines tasting impressions of the Front Street Coffee Deborah Estate Savage Series Anaerobic Natural Geisha to guide you from theory to practice in fully understanding the characteristics and processing flow of anaerobically fermented coffee beans. [more…]

Finca El Paraiso is a family-run coffee estate in Colombia's Cauca region, renowned for its innovative processing methods. Its anaerobic natural coffee beans, with their pronounced fermented character and sweetness, have become a favorite among many coffee enthusiasts. In this article, Front Street Coffee will take you deep into this bean's regional background, varietal characteristics, and processing techniques, and share a complete set of insights ranging from the roasting curve to cupping flavors, all the way to V60 brewing and SOE extraction. Whether you're a pour-over enthusiast or an espresso player, you'll find practical reference parameters and key operating points here. [more…]

In coffee tasting, "fermentation" is a term that is often mentioned but easily misunderstood. It does not mean that the coffee contains alcohol; rather, it describes an aroma and mouthfeel reminiscent of ripe fruit or even overripe fruit. Coffee itself is a fermented food, and its flavor is deeply influenced by the way it is processed. This article starts from everyday conversations at Front Street stores and systematically explains the essence and sources of fermenty notes, as well as the differences between aerobic fermentation, anaerobic fermentation, and double anaerobic fermentation. At the same time, we will also explore how the fermentation process shapes coffee's aroma and complexity, and recommend Front Street's natural, honey-processed, and anaerobic-processed coffee beans for different preferences, helping you find the cup that suits you best in your everyday purchases. [more…]

This anaerobic dried-fruit natural coffee from Finca El Pino in Antioquia, Colombia, brought to you by Front Street Coffee, is a micro-lot custom-flavored bean from the 2019 harvest. It uses the Castillo variety and, through a refined anaerobic dried-fruit natural process, presents rich layers and extremely high sweetness. This coffee, named "Fruit Brew," is intended to express notes of ripe dried fruit and fruit wine. Front Street designed a well-developed light roast profile for it, striving to maintain a clear and intense flavor expression from high to low temperatures, with excellent smoothness and sweetness. This article will introduce in detail the background of Finca El Pino, the characteristics of the anaerobic dried-fruit natural process, and the flavor profile and roasting approach of this coffee, taking you deeper into the charm of this unique micro-lot coffee. [more…]

Front Street's Sidra coffee beans come from Finca El Diviso in Colombia, processed using the double anaerobic natural method, with intertwined flavors of grape, passion fruit, and apricot, and they have performed impressively in world competitions. However, many enthusiasts encounter a problem of bland taste and thin body when brewing, which is usually related to under-extraction. This article will focus on the characteristics of the double anaerobic natural process, analyze the reasons for the loose structure of Sidra beans, and explain step by step how to let this champion bean release a suitable and full-bodied flavor, from Front Street's grinding setting, water temperature, coffee-to-water ratio, to the three-stage pouring technique. [more…]

Colombia, with its high mountains and flowing water, volcanic fertile soil, and abundant rainfall, is regarded as a natural treasure trove for coffee cultivation. Between 2008 and 2011, the country's coffee won the championship four years in a row at the SCAA Cup of Excellence competition, a record that even surpassed Panama Geisha's BOP three-peat. This article will take an in-depth look at the terroir characteristics of Colombia's major specialty coffee regions, covering Huila, Tolima, Cauca, and Nariño, and will focus on key varieties such as Caturra, Colombia, and Castillo. At the same time, Front Street Coffee will use a practical comparison of Flower Moon Night and Rose Valley to help you understand the specific effects of washed, anaerobic natural, and double anaerobic enzyme-washed processing methods on flavor direction. [more…]

When faced with coffee beans processed in different ways, is it necessary to design a separate brewing recipe for each one? Front Street believes that rather than recording tedious parameters one by one and bearing the high cost of trial and error, it is better to categorize beans by processing method or roast level and use a single recipe with a broad coverage range. This article focuses on three processing methods—natural, washed, and anaerobic—explaining the differences in their flavor expression, as well as the targeted adjustments that can be made during brewing, including the thinking behind setting water temperature, coffee-to-water ratio, grind size, and extraction time. The article also specifically explains why anaerobically processed coffee drains faster, and how to ensure full extraction by grinding finer or switching to a slower-flow filter basket. All parameters are based on medium-light roasted beans, with adjustment suggestions for medium-dark roasted beans included. [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…]

Nowadays, the names of coffee processing methods are becoming more and more varied, from anaerobic natural to low-temperature slow anaerobic washed, from black honey and red honey to enzyme washed, making one dazzled. Behind this complexity, there are actually two main threads: the birth of early processing methods was the result of the producing region's environment forcing it—for example, Indonesia's humid and rainy climate gave rise to washed and wet-hulled methods; while the evolution of contemporary processing methods stems from the consumer market's dual pursuit of flavor expression and traceability information. This article will sort out the evolution from natural, washed to honey processing and anaerobic fermentation, analyze how different processing techniques affect coffee flavor, and reveal the deeper reasons behind the increasingly refined naming of processing methods. [more…]

As a veteran famous estate in the Boquete production region of Panama, Elida Estate has won championships in BOP competitions for many years, and its Catuai variety coffee beans have always attracted much attention. This article focuses on the newly listed Elida Estate · Anaerobic Natural Catuai from Front Street, providing a detailed interpretation of the ASD (slow anaerobic natural) processing method, analyzing the flavor performance and roasting approach of this bean, and sharing Front Street's specific parameters and serving experience in pour-over and espresso preparation. Whether you want to understand the tier positioning of this bean or are curious about the unique flavors brought by ASD processing, you can find the answers here. [more…]

Coffee processing methods directly influence the flavor direction in the cup. Natural processing, as the most traditional method of green coffee processing, allows the fruit pulp to wrap around the seed and dry slowly, resulting in a broader flavor spectrum and greater sweetness; anaerobic natural processing, on this basis, introduces sealed low-temperature fermentation, which slows pectin decomposition and causes pH to drop more gradually, thereby accumulating more sweet compounds. This article will start from the specific processes of the two methods, analyze their effects on coffee flavor, and use Front Street Colombia Luna Night, which employs anaerobic natural processing, as an example to explain how to adjust grinding, water temperature, and pouring technique for such beans to brew a full fermented sweetness and a rounded mouthfeel. [more…]