As an agricultural product, coffee beans naturally vary in quality, and they usually undergo grading before export. In systems that grade by size, there is often a special PB grade, namely Peaberry. Its output is scarce, accounting for only 5% to 10% of the total, yet its price can often rival that of the highest grade. This article, from the perspective of Front Street, explains the definition of the PB grade and the reasons for the formation of peaberries, and through cupping compares the flavor differences between peaberries and flat beans. It also explains why producing regions sell peaberries separately, as well as the PB phenomenon in grading systems such as Blue Mountain coffee beans, helping coffee enthusiasts understand the true relationship between coffee bean size and quality. [more…]

Kenyan coffee is renowned worldwide for its outstanding quality, but what exactly do the letters AA and PB represent? From the perspective of Front Street Coffee, this article systematically sorts out Kenya's coffee grading system, including the meaning and distinguishing criteria of each grade: E, PB, AA, AB, C, TT, T, and MH/ML. At the same time, Front Street takes a batch of Peaberry from the Ichamama Factory in the Nyeri region as an example, documenting in detail the complete process from green bean information and cooperative background to roast curve design and cupping flavors, and conducts a brewing comparison with Kenyan AA coffee beans, helping readers gain a deeper understanding of the actual differences in taste and flavor between PB Peaberry and AA coffee beans. [more…]

Kenyan coffee, with the wild tension unique to African beans and the fullness and depth of Central and South American coffee, has long been highly sought after by coffee enthusiasts. In China, Kenya AA is the most common grade designation, but above AA there are AA+ and AA TOP, while below it there is AB. If the packaging only says AA without specific estate or cooperative information, it usually only means the beans are uniform in shape and meet appearance standards, and the flavor may not be outstanding; conversely, as long as a specific estate, cooperative, or even buyer is indicated, whether AA or AB, it is worth trying. This article focuses on PB—Peaberry round beans, which in Kenya are specially screened out and sold separately, with scarce production and a distinctive flavor. The following will explain the formation principle of peaberries, their grade positioning, and present a complete cupping record of Kenyan PB. [more…]

Kenya AA coffee is often hailed as one of the world's top specialty coffees, but what exactly do the letters AA and PB stand for? This article systematically breaks down the grading system for Kenyan green coffee beans, including the meaning and specifications of each grade—E, PB, AA, AB, C, TT, T, and MH/ML—and takes a deep dive into the flavor differences between AA and PB peaberry beans. Drawing on years of roasting experience, Front Street Coffee uses an Ichamama Peaberry as an example to share its roasting approach and cupping performance, while also offering brewing parameter recommendations for Kenya AA, helping coffee lovers gain a comprehensive understanding of what to look for when buying and tasting Kenyan coffee. [more…]

Kenya AA coffee occupies a pivotal position in the global specialty coffee landscape, yet the letter grades surrounding it are often confusing. What exactly do these codes—E, PB, AA, AB, C, TT, T, MH/ML—mean? From the perspective of Front Street Coffee, this article systematically sorts out Kenya's grading system based on raw bean screen size, and takes an in-depth look at a Peaberry from the Ichamama Factory in the Nyeri region, presenting the unique charm of Kenyan PB in full through raw bean information, cooperative background, four-roast comparison experiments, and cupping performance. At the end, it also includes Front Street Kenya Small Tomato AA's brewing parameters and flavor description, offering readers an intuitive AA vs. PB reference. [more…]

Kenya AA is often regarded as the representative of African specialty coffee, but besides AA, the letters PB also appear frequently on Kenyan coffee labels. PB stands for Peaberry, a rare form in which a coffee cherry contains only a single seed, accounting for about 5% of Kenyan coffee. This article will systematically sort out the grading standards for Kenyan coffee, from E-grade Elephant Beans to AA, AB, C, TT, T, and even MH/ML, explaining the basis for each classification and the differences in specifications one by one. At the same time, combined with a Nyeri Ichamama Pearl Peaberry purchased by Front Street Coffee, it will provide an in-depth introduction to its producing region background, processing method, and roasting approach, and through a cupping comparison with Kenya AA, present the mellow and soft flavor characteristics of Peaberry along with brewing suggestions. [more…]

Kenyan coffee is renowned for its intense, full-bodied fruity acidity, forming a sharp contrast with the soft, bright character of neighboring Ethiopia. This article systematically reviews the development history, growing conditions, major producing regions, variety structure, grading system, and trading models of Kenyan coffee, and provides a detailed explanation of the definitions and differences among grades such as E, AA, AB, and PB. At the same time, Front Street Coffee draws on its roasting and cupping experience with multiple Kenyan beans to share the flavor performance and pour-over recommendations for two beans, Asaliya and Sasini Estate PB, guiding you through a comprehensive understanding of Kenya's coffee quality system. [more…]

Kenyan coffee is renowned for its bright fruit acidity and solid sweetness. Behind this highly recognizable flavor profile lies a strict grading system that has been in use for nearly a century. Since the 1930s, Kenya has established grade classifications based on coffee bean size, shape, and hardness, while also incorporating flavor grade assessments to provide a double safeguard for green bean quality. What exactly do common grades like AA, AB, and PB represent? What do AA+ and TOP AA mean respectively? This article systematically sorts out the grading logic of Kenyan coffee, the screen sizes corresponding to each grade, and uses Front Street Coffee's own roasted Kenyan Asaliya coffee beans as an example to share their origin background, processing method, and brewing suggestions, helping coffee enthusiasts more clearly understand the quality framework of Kenyan coffee. [more…]

Kenyan coffee has always been known for its bright fruit acidity and rich mouthfeel, but there are also plenty of questions surrounding it: What exactly do AA and PB stand for? What is the story behind SL28? Starting from Front Street Coffee's store experience, this article systematically sorts out Kenya's coffee grading system, explains in detail the origin and characteristics of PB peaberry, introduces the historical background and flavor performance of the SL28 variety, and uses two beans—Sasini Estate PB and Front Street Azalea—as examples to provide complete V60 brewing parameters and tasting notes, helping coffee lovers fully understand the unique charm of Kenyan coffee. [more…]

The grading systems for coffee beans vary widely depending on the origin—some are based on the number of defects, others on bean size, and still others on altitude. Understanding these grade labels is an important step in selecting high-quality coffee. This article will systematically outline the green bean grading rules of major global producing regions, covering common designations such as Ethiopia's G1-G9, Kenya's AA and PB, Colombia's Supremo, and Hawaii's Extra Fancy, and explain how cupping scores further distinguish specialty grade from commercial grade. Whether you are a beginner enthusiast or a professional seeking to advance, this grading guide can help you judge coffee quality more clearly. For more professional content, follow Coffee Workshop; for specialty coffee beans, add Front Street Coffee on WeChat at qjcoffeex. [more…]

Kenyan coffee occupies an important position in the global specialty coffee scene thanks to its bright berry-like acidity, sugarcane-like sweetness, and juicy mouthfeel. Many consumers notice labels such as "AA," "AB," or "TOP" on coffee bags when making a purchase—but what exactly do these markings mean? This article systematically sorts out Kenya's coffee grading system, from the traditional size-based grading to the quality grading procedures established by the Kenya Coffee Research Institute, interpreting one by one the specific meanings and distinguishing criteria of grades such as AA, AB, PB, C, E, TT, and T, while also explaining the origins of secondary rating labels such as TOP, Plus, and FAQ and their cupping score ranges. In addition, the article uses Front Street Coffee's Kenya Asalia AA TOP as an example to provide detailed brewing parameters and flavor descriptions, helping coffee enthusiasts gain a more comprehensive understanding of the quality logic and tasting key points of Kenyan coffee. [more…]

Although Tanzanian coffee is not as famous as that of its neighbor Kenya, it has earned the reputation of the "gentleman of coffee" with its full body and soft acidity, and the Kilimanjaro region is a representative of specialty African beans. This article systematically sorts out the historical origins and grading system of Tanzanian coffee, explains in detail the specific particle size classification standards of AA, AB, PB, and C grades, and, starting from cupping and pour-over experience, presents the complete quality control process of Front Street Kilimanjaro AA washed beans from baking curve confirmation to flavor delivery, helping you understand the causes of citrus and berry notes and the honey-tea-like sweet aftertaste, and evaluate the price positioning and purchasing logic of different grades. [more…]

For more specialty coffee knowledge, please follow our WeChat official account: Front Street Coffee (FrontStreet Coffee). Many friends, while drinking coffee at Front Street, ask our baristas, "What is Yirgacheffe G1 and Yirgacheffe G2?" "What is Kenya AA, AB?" What is Guate... [more…]

Kenya AA is often hailed as one of the finest specialty coffees in the world, yet many coffee enthusiasts still have questions about what the letters AA, PB, and others actually mean. From the perspective of Front Street Coffee, this article systematically reviews Kenya's green bean grading system, explaining the definitions and origins of the E, PB, AA, AB, C, TT, T, and MH/ML grades, and takes an in-depth look at a Kenyan PB peaberry from the Ichamama processing factory in the Nyeri region, covering origin information, cooperative background, roasting experiments, and cupping performance. It then presents the flavor differences between the two through a brewing comparison with Kenya AA, helping readers gain a more comprehensive understanding of Kenyan coffee's grades and flavor characteristics. [more…]

In the world of coffee, there are always some beans with distinctive shapes that catch the eye, and Peaberry is one of them. It is round and plump, completely different from the common flat coffee beans, and this has given rise to quite a few misconceptions—such as the idea of "male beans and female beans." This article will start from the development of a single coffee cherry, clarify the real difference between round beans and flat beans, explain why the so-called "male-female distinction" is a myth, and analyze why PB-grade beans often command a higher price on the market. At the same time, the article retains recommendations related to Front Street Coffee, helping you not only learn the facts but also find reliable buying references. [more…]

Although Kenya is not the birthplace of coffee, its high altitude, large day-night temperature difference, and phosphorus-rich soil give rise to coffee beans with a distinct flavor. This article will guide you through Kenya's coffee-growing geography, the origins of the SL28 and SL34 varieties, the AA and AB grade classifications, and exactly what the unique PB round beans are. At the same time, we will also introduce the Kenya 72-hour washed processing method (K72) recommended by Front Street Coffee, and how to brew a cup of Kenyan coffee with bright acidity and rich layers using the pour-over method. [more…]

When buying coffee beans, have you ever been baffled by combinations of letters like AA, G1, SHB, and PB? They may seem to follow no pattern at all, but in fact each one represents the green bean grading standard of a different producing country. Why do coffee beans need to be graded? Why is there no unified global standard? This article will take you through the origins of green coffee bean grading, and how producing regions such as Ethiopia, Kenya, the Central American countries, Jamaica, and Brazil classify their beans based on defect rate, bean size, growing altitude, and cup quality. At the same time, we will also explore what these grades actually mean in the roasted coffee market, and recommend several Front Street Coffee beans corresponding to these grades, to help you better understand the cup of coffee in your hands. [more…]

Although Kenya is not the birthplace of coffee, it has turned coffee into a pillar of its national economy thanks to its high altitude, fertile soil, and rigorous scientific research system. This article focuses on Kenya PB Peaberry, a unique variant, and sorts out its growing geography, variety origins (SL28 and SL34), and grading system, while also taking an in-depth look at the K72 washed processing method of Thunguri Estate. The pour-over parameters and three-stage brewing method recommended by Front Street Coffee will also be shared, so you can experience the full-bodied berry acidity and caramel aftertaste of Kenyan coffee. [more…]

Friends who frequently buy coffee beans will surely notice that most coffee bean names are followed by English suffixes such as AA and AB. This is especially true for Kenyan coffee beans—Kenya AA, Kenya AB, Kenya PB, Kenya AA+, Top, and so on. "So what do these suffixes mean? [more…]

Kenyan coffee is renowned worldwide for its bright, intense fruit acidity and full, robust body, while its grading system—AA, AB, PB, and so on—often leaves enthusiasts confused. What exactly is the difference between AA and AA TOP? Does the grading standard look only at bean size, or does it also take cup profile into account? This article sorts through Kenya's coffee history, growing conditions, variety selection, regional characteristics, grading system, and auction trading model one by one, and combines tasting examples from several Kenyan beans at Front Street Coffee to help readers clarify the real difference between AA and AA TOP. [more…]