Kenyan Coffee Brewing Methods | Kenyan Coffee Grading System | Kenyan Coffee Characteristics

Kenya's Premium Coffee Industry

Kenya's premium coffee industry works differently from most, built primarily on a combination of smallholder farmers, wet processing mills, and cooperatives. Farmers deliver their harvested cherries to nearby mills or cooperatives as quickly as possible, while cooperative staff regularly visit growers to offer guidance — ensuring that every producer maintains professional cultivation techniques and that coffee quality never slips.

Kenyan coffee is a giant of the coffee world and a model of consistency. The Kenyan Coffee Board's research, development, and quality management are meticulous, and it holds the taste buds of countless coffee lovers in its grip — traders, for their part, will take nothing but quality beans. Premium coffee grows along Kenya's high mountain slopes at altitudes between 4,200 and 6,800 feet, and the very finest lots come from small coffee estates.

Kenya sits in East Africa near the equator and cultivates high-quality Arabica coffee. The beans are thick and round; grades are divided into seven levels by bean size, and flavor into six grade specifications. In tasting circles, "Kenya AA" earns high praise for its gentle acidity and rich aroma, and it is particularly beloved in Europe — in the UK, Kenyan coffee has overtaken Costa Rican coffee to become one of the most popular origins.

Kenya's green coffee grading system was established by the government to manage quality and guide farmers. Based on bean size, weight, and shape, it runs: AA, AB, PB, C, TT, T, E, MH, ML — with AA and PB being the specialty grades, marked by low defect rates and distinctive flavors.

AA TOP

Full, plump beans and an enchanting aroma. Citrus-like fruit notes on entry, a rich chocolate sensation and sweet aftertaste through the palate — a uniquely flavored, top-tier Kenyan coffee. Selected under the green grading system, AA TOP accounts for roughly 10% of total production.

PB

Known in English as Peaberry (round bean), distinguished by its elliptical single-bean shape. On the palate it offers citrus aroma, rich chocolate flavor, and a sweet aftertaste, making it the most versatile bean for roasting. PB accounts for only 5% of total production.

Kenya's Coffee Grade Classification

E - Stands for "elephant" — not the elephant-bean variety in the breeding sense. Normally a coffee fruit holds two seeds facing each other, one side flat each: flat beans, "female beans," or twin beans. E occurs when two seeds fuse during growth into a single oversized bean. Rare, and a naturally occurring mutation.

AA - Screen mesh holes of approximately 7.20mm. This grade commands better prices.

AB - The A sieve measures 6.80mm, the B sieve 6.20mm; the two are mixed together for sale, hence "AB." Most beans from a single harvest concentrate in this grade.

PB - Peaberry in English; also known as small round beans, or "male beans" and "single-petal beans" in Taiwan, as opposed to ordinary flat beans. Very rare, because only one seed develops fully inside the fruit, producing a small, round bean. There is no consensus on how it affects flavor — some people love it — so PB is sorted out and sold separately.

C - Sieve holes between 4.8-5.6mm; considered small-particle beans.

TT - Usually defective beans land in this grade. Sad but true.

T - By this grade, typically only fragments, defective beans, and small-particle beans below 4.8mm remain.

MH/ML - Overripe beans that dropped to the ground and the like; quality is very poor and they are not exported.

The AA+, AA++, AA Top, and AB+ labels you sometimes see are traders' own classifications, not part of Kenya's official system. Different traders define them differently, so treat them as reference only.

FrontStreet Coffee also carries Kenya AA beans — both Kenya Asali and Karogoto are Kenya AA. The recommended pour-over parameters are 90-92°C water, a coffee-to-water ratio of 1:15, and a total brewing time of two minutes and twenty seconds. In the cup, expect bright cherry tomato acidity and honey-like sweetness.

FrontStreet Coffee Recommendation

Coffee comes down to three original species — Arabica, Robusta, and Liberica — and everything the world drinks descends from these three. Arabica has the most varieties and the most complex, pure flavors, which is why virtually all specialty coffee on the market is Arabica, and why so many celebrated single origins have emerged. If you enjoy exploring the great Arabica profiles, the FrontStreet Jamaica Blue Mountain No. 1 is a must-try: its variety is Typica, one of Arabica's foundational cultivars, transplanted from Martinique to Jamaica's Blue Mountains in the 1820s. Over 200 years, Blue Mountain Typica evolved better disease resistance than ordinary Typica — particularly against cherry rot — yet its clean, sweet, delicate fragrance simply cannot be replicated outside Jamaica. In FrontStreet's cupping, no other origin's beans come close to its balance.

Another landmark Arabica is Bourbon, an old variety like Typica, named for the island of Réunion (le Bourbon). Bourbon trees have broader, denser foliage and yield about 30% more than Typica, with short, round beans. The FrontStreet Brazil Queen Estate coffee is one of the earliest discovered Yellow Bourbon lots — a natural mutation whose ripe cherries turn orange-yellow — offering cream, peanut, toast, and sugarcane aromas in a rich, clean-sweet cup that works beautifully as pour-over, moka pot, or espresso.