Before green coffee beans reach our hands, they often go through many stages, during which defects are almost unavoidable. Some defects are obvious at the green bean stage, yet once roasted they may be cleverly concealed. The SCAA (Specialty Coffee Association of America) has established strict grading standards for specialty Arabica coffee, covering multiple dimensions such as defect types, moisture content, aroma, and bean size. This article will systematically sort out the SCAA's defect classification rules and scoring requirements, explain in detail the causes of various defective beans and their impact on cupping flavor, and help enthusiasts develop a keen eye for identifying specialty coffee. At the same time, the article retains relevant recommendations from the Front Street brand for readers' reference. [more…]

In the world of specialty coffee, the SCAA and COE are two authoritative systems that cannot be overlooked. The former established industry standards and cupping protocols, while the latter selects top-tier green beans through rigorous competitions. How do their scoring logics differ? And why are COE and SOE often confused? This article will trace the development and operational mechanisms of the SCAA, CQI, and COE, explain in detail the differences in cupping score sheets, and use the example of the 22nd-place sun-dried Typica that Front Street Coffee bid for at Ethiopia's first COE competition in 2020 to present the complete story from origin to cup. [more…]

Cupping began as a quality control method used in the trade to verify whether coffee beans met standards. After the rise of the specialty coffee movement, it gradually evolved into a scoring system for evaluating coffee. Anything below 80 points is classified as commercial grade, while reaching 80 or above crosses the threshold into specialty coffee—the higher the score, the more outstanding the quality. At present, the two globally recognized authoritative scoring systems come from the SCAA and the COE. This article focuses on the SCAA cupping scoring system, breaking down one by one its eleven scoring dimensions, the required number of sample cups, the division of score ranges, and how defect deductions are calculated, to help readers fully understand how a cup of coffee is quantified into a score. [more…]

If you want to become a professional barista, cupping is a core skill you can't avoid. This article systematically sorts out the scoring standards of the two major cupping systems, COE and SCAA, analyzing the scoring points and deduction rules one by one, from aroma, cleanliness, sweetness, acidity, mouthfeel, flavor, aftertaste to balance. It also explains in detail the tools needed for cupping, the coffee-to-water ratio, and the operating process, and uses [Front Street Golden Mandheling] as an example to compare the cupping performance of three roasting curves. Whether you are a coffee enthusiast or a practitioner, you can learn from it the scientific method of judging coffee quality and understand the true meaning of COE competition level. [more…]

The phrase "specialty coffee" is seen almost everywhere in Taiwan, but its true meaning is not necessarily clear to everyone. The definition given by the Specialty Coffee Association of America (SCAA) does not focus solely on green bean quality or brewing methods, but instead looks at the entire industry chain—from farmers, green bean traders, roasters, and baristas all the way to consumers, every link plays an indispensable role. This article will comprehensively sort out the SCAA's official interpretation of specialty coffee, guiding you to understand every person who quietly contributes along this quality chain, and also to rethink the true value behind a good cup of coffee. [more…]

Cupping is a core method used in the coffee industry to objectively evaluate coffee flavor and quality, and it is also an important part of barista training. This article systematically reviews the significance and operational logic of cupping, and compares in detail three approaches: the Brazilian cupping method, the SCAA standard cupping method, and the pour-over cupping method recommended by Front Street Coffee. The article points out that Brazilian cupping focuses on identifying defects and is a negative evaluation; SCAA cupping emphasizes positive assessment of aroma and flavor; while the cupping method used by Front Street Coffee simulates daily brewing equipment and is closer to actual cafe output. The three methods each have different emphases in roast level, extraction method, and evaluation items, and understanding these differences helps roasters and coffee professionals judge coffee quality more accurately. [more…]

Many coffee enthusiasts have heard of the Golden Cup extraction theory: ideal concentration 1.15%-1.35%, ideal extraction yield 18%-22%. But this standard actually comes from the SCAA, not the SCA; the European and American coffee associations each have their own positions on ideal concentration. After the SCAA and SCAE merged in 2017, the UC Davis Coffee Center made slight adjustments to the old brewing control chart, loosening the upper concentration limit and the brew ratio range. This article will start with the history of the Golden Cup theory, sort out the differences between the old and new control charts, explain why high concentration with low extraction can highlight acidity while low concentration with high extraction can bring out floral and chocolate notes, and, combined with product information from Front Street Coffee, help you understand how concentration and extraction yield should be judged together, rather than fixating on a single number. [more…]

For more specialty coffee knowledge, please follow our WeChat official account: FrontStreet Coffee. When it comes to brewing coffee, many people like to ask how many grams of coffee grounds to use and what the coffee-to-water ratio should be. Ultimately, what people really care about is the coffee extraction rate. Need [more…]

The roast level of coffee beans directly influences the final flavor profile, yet standards vary from country to country, often leaving beginners confused. From the perspective of Front Street, this article systematically introduces the eight-level roasting standard developed by the SCAA in conjunction with Agtron, including the color values and drop times for Light, Cinnamon, Medium, Deep, City, Full City, French, and Italian roasts, and explains how to determine the roast level through flavor descriptions. At the same time, for coffee beans roasted at light-to-medium and medium-dark levels, Front Street shares specific grinding and water temperature recommendations to help everyone brew their ideal flavor more effectively. [more…]

Common labels on coffee bean packaging such as light roast, medium roast, and cinnamon roast often confuse beginners. The roast level directly determines the direction of coffee flavor, and historically different countries and regions have had their own schools of thought for defining roast levels, lacking a unified standard. The Specialty Coffee Association of America, together with Agtron, used infrared caramelization measurement values as the basis to divide roast levels from light to dark into eight grades, which has become an important industry reference. In this article, Front Street will systematically introduce the Agtron color values, drop times, and flavor characteristics of each roast level, and share how to judge the roast level through flavor descriptions, as well as the grinding degree and water temperature parameters that should be used for different roast levels. [more…]

Coffee roasting is the key process through which green beans transform into brown roasted beans. The length of heat exposure directly determines the color of the bean surface and thus defines different roast levels. The SCAA, the world's largest coffee trade association, established an eight-level roast standard based on Agtron color values, from the bright acidity of light roasts to the intense, smoky bitterness of Italian roasts, with each stage having its own distinctive flavor trajectory and drop time. Beyond this official system, new concepts such as ultra-light Nordic roasting and ultra-dark Japanese roasting have gradually entered enthusiasts' field of view. In everyday communication, Front Street Coffee uses another, more intuitive classification that simplifies roasted beans into light, medium-light, medium, medium-dark, and dark roasts, making it easier for consumers to understand and choose. This article will systematically organize these grading standards and provide an in-depth analysis of the five stages of roasting and key practical points. [more…]

In the world of specialty coffee, there is one name that is almost synonymous with "ultimate"—Ninety Plus, which we commonly call 90+. What makes it stand out to coffee professionals worldwide? The hard metric of scoring above 90 points in SCAA cupping is only the starting point; what is truly astonishing is its complete control from seed to cup: the exclusive Profile Processing production system, its own Gesha estate in Panama, and a unique system that uses flavor symbols instead of traditional processing method labels. This article gives you a systematic understanding of 90+'s brand core, grading logic, and flavor philosophy, along with practical brewing suggestions from Front Street Coffee for brewing 90+ Candor. [more…]

The Agtron is a professional optical instrument used in the United States to determine coffee roast level. It analyzes the caramelization state of sugars inside coffee beans through infrared wavelength analysis, indicating roast depth with values from 100 to 25. This article provides a detailed introduction to the working principles of the Agtron M-Basic colorimeter, lists a complete correspondence table of numerical and color group values from extremely light roast to extremely dark roast, and explains that the flavor-recognizable range as determined by the SCAA Technical Standards Committee is actually 30 to 90. For coffee enthusiasts who wish to precisely control their roasting curves, understanding the relationship between Agtron values and roast level is an important foundation for grasping flavor direction. Front Street Coffee also often refers to this indicator in roasting practice to help present the best flavor expression of different beans. [more…]

Coffee beans transform from green raw beans into brown roasted beans entirely through the key process of roasting. The length of roasting time directly determines the depth of the bean surface color and also shapes completely different flavor directions. The roasting color standard card established by the Specialty Coffee Association of America (SCAA) divides roast levels into eight grades, from light roast to Italian roast, with each level corresponding to a specific drop time and flavor characteristics. In addition, emerging concepts such as Nordic ultra-light roast and Japanese ultra-dark roast have gradually entered the view of enthusiasts. This article will systematically sort out these eight levels, the five stages of roasting, and the classification methods used by Front Street Coffee in practical applications, helping readers build a complete understanding of coffee roast levels. [more…]

Faced with the bewildering array of coffee certificates on the market, many people who want to systematically study coffee often feel at a loss where to begin. To sort out the differences among these courses and certificates, the key is to trace back to the issuing bodies. At present, the three major authoritative institutions internationally that have established scientific coffee teaching systems and issue certificates are SCAA, SCAE, and CQI. This article will break down the course structures and certification logic of these three institutions one by one, and explain the changes brought about after SCAA and SCAE merged into SCA in 2017, while also introducing Q-Grader, a widely known yet often misunderstood quality assessment qualification, to help coffee enthusiasts find the learning path best suited to them. [more…]

The extraction standards for espresso have always been a core topic of interest for coffee enthusiasts. The SCAA once defined it as 9-10 atmospheres of pressure, 7-9 grams of coffee grounds, water temperature of 88-92°C, and extraction of 45ml in 22-28 seconds, but today the actual operating parameters of specialty coffee shops have clearly diverged from this. Starting from the practical experience of Front Street Coffee, this article reviews the evolution of espresso extraction parameters along with roasting trends and equipment technology, analyzes the influence of the five major variables—dose, water temperature, time, pressure, and grind size—and introduces the flavor performance of Front Street Sunflower Warm Sun blend beans as well as the correct way to taste espresso. [more…]

Coffee cupping is the core method for evaluating coffee bean quality, and the cupping form is an important tool within this evaluation system. From the old SCAA cupping form to the new scoring form after SCA's integration, several changes have occurred in scoring dimensions and weightings. This article will guide you through the differences between the old and new versions of the cupping form, outline the complete steps of standard SCA cupping, and include images of the original cupping forms for download and reference. Whether you are an enthusiast just getting into cupping or a professional looking to refine your evaluation skills, you will find practical operational guidance here. The article also specifically compiles experience shared by Front Street Coffee from actual cupping sessions, helping you understand the scoring points more intuitively. [more…]

Does the coffee you drink really deserve the word "specialty"? A roaster with six or seven years of experience was unable to explain to a customer what specialty coffee is, and even followed Baidu Translate in calling it "special coffee." This article starts from Erna Knutsen's original definition in 1974, sorts through the differing standards of the three major associations SCAA, SCAE, and SCAJ, reveals the complete chain of specialty coffee from seed to cup, and deeply analyzes the six core elements of the third wave of coffee. Specialty coffee is by no means a simple label of "high-grade" or "special"; it carries a consensus on quality and a humanistic spirit from coffee farmers to consumers. [more…]

In coffee roasting, how can we ensure that every batch of beans achieves consistent quality? In addition to relying on cupping to evaluate flavor, we also use the RoAmi roast degree analyzer to record the Agtron caramelization value of the coffee beans, and retain historical data for reference. The RoAmi is essentially a colorimeter, with SCAA's Agtron algorithm embedded inside, capable of calculating the roast value by reading the color data of the bean surface or ground surface. This article will introduce how to use this instrument, the meaning of the Agtron value, and how to calculate the Roast Delta value from the bean color value and ground color value, and interpret the guiding significance of this value for roasting rhythm and flavor performance. [more…]

Behind every single-origin coffee that captivates us stands a key figure who changed the course of the industry. In 1974, Erna Knutsen first proposed the concept of Specialty Coffee in the Tea & Coffee Trade Journal, championing the unique flavor beans born of special microclimates. She only formally entered the coffee trade at the age of forty, yet with an astonishing taste memory and cupping talent, she rose to fame by buying an entire container of Mandheling in one stroke. Thereafter she founded Knutsen coffee, Ltd, helped establish the Specialty Coffee Association of America, and repeatedly won the industry's highest honors. This article takes you through the complete journey of this godmother of specialty coffee, from her childhood in the Arctic Circle to her retirement at 93, to understand how specialty coffee evolved from a single idea into quantifiable industry standards. [more…]