Which Kenya AA Single-Origin Coffee Brand Tastes Best? Guide to Kenya Coffee Bean Processing

Understanding Kenyan Coffee Bean Grading

Kenyan coffee beans are graded by bean size: AA denotes the largest beans, while PB refers to small, round peaberries. That said, size alone doesn't decide flavor quality. (Though if a single bag shows wildly inconsistent bean sizes, quality is almost certainly a problem.)

For drinking at home, estate lots are the better buy — in China they typically run from several hundred to over a thousand yuan per jin — and they taste in a different league from commodity-grade AA: far more expressive, with a real chance of discovering something exceptional.

Among roasters selling under their own names, options in China include Fisher, FrontStreet Coffee, Seesaw, Kafe of Memory (a somewhat low-key shop with most items unlisted — you'll need to ask the staff directly, but their coffee is excellent), and Mingqian Coffee. Even a Kenyan AA priced at just 70 yuan per jin from these roasters won't disappoint in flavor.

One more thing worth saying: if you're new to specialty coffee or pour-over brewing, it pays to learn a bit before spending. If your palate is calibrated to dark, carbonized, roasty flavors, the sweet-and-tart fruit character of specialty coffee can take a little getting used to.

Chapter 01: Cultivation

Exceptional Growing Environment

As the saying goes, "Good cows produce good milk; good soil grows good coffee." Kenyan coffee is cultivated on highlands between 1,400 and 2,000 meters, rooted in nutrient-rich volcanic soil.

The climate is comfortable year-round — never hotter than a European summer — with rainfall spread evenly across the year. The deep red volcanic soil, laid over significant slopes, drains superbly. Together these conditions make coffee from most Kenyan regions unlike anything else in the world.

About 60% of Kenya's coffee comes from smallholder farmers, who tend steep slopes that could never be converted to large-scale plantations — land they care for meticulously.

Chapter 02: Harvesting

Desperate to Shine

There are two harvests each year. The main season opens with the October rains and runs through year-end, while the smaller fly crop stretches from June-July into early August.

During harvest, every cherry is hand-selected, and only bright red, fully ripe fruit makes the cut. To earn a debut in the spotlight, the cherries are desperate to shine red.

Inner monologue: Pick me! Pick me!

Chapter 03: Pre-selection & Dehulling

Shedding Splendid Attire, Leaving Only Core Competitiveness

Smallholder farmers lack complete processing equipment, so after harvest the cherries are delivered to coffee cooperatives (known locally as "factories") for centralized processing.

Before the skin and pulp are removed, a pre-selection round eliminates any cherries that fail the weight and maturity standards.

Once the bright red outer layer comes off, what remains is the core asset — the seeds, which at this stage are preliminary green coffee beans.

The discarded skins and pulp return to the soil, becoming nutrients that nourish the next generation of cherries.

Chapter 04: Double Fermentation

Good Things Come in Pairs — We're Different

In Kenya, the highest quality beans undergo washed processing — but not the ordinary kind. In a typical washed process there's a single fermentation after de-pulping, which strips the mucilage layer in one go.

Kenyan coffee goes through double fermentation: the first, lasting 12-24 hours, removes 80%-90% of the mucilage layer.

After washing, a second fermentation of 24-48 hours breaks down what remains. The double pass prevents the foul odors of over-fermentation while enhancing both flavor and mouthfeel.

Chapter 05: Final Washing & Grading

Even Brothers Must Part Ways

Finally comes a thorough bath — it leaves the beans clean, and it also produces more uniform color and more balanced flavor in the green coffee.

The flowing water also separates beans of different densities — the heavyweights stand out immediately — which makes grading easier and more accurate.

Kenyan coffee is sorted into seven separate grades based on bean size, weight, and hardness.

E-grade elephant beans and PB round beans are special cases, not graded simply by size and hardness. AA sits at the top of the quality pyramid, carrying the most aroma and flavor — essential for a truly excellent coffee.

Chapter 06: Drying

Talent-focused, Rejecting Excess Moisture

Before drying, one more manual sorting removes any beans with poor appearance — even coffee beans get judged on looks! Drying then brings the moisture content down from 55% to 12%, making the beans stable for storage and ready for roasting.

Chapter 07: Cupping & Auction

Outstanding Graduates Ready to Enter the World

Coffee cuppers score each lot comprehensively — green bean quality, roasted bean quality, and the tasting experience all count.

All Kenyan coffee is purchased through the Coffee Board of Kenya (CBK), which runs weekly auctions where licensed dealers bid competitively for the lots.

After passing through so many stages, these beans will either stay and shine locally or venture far abroad — the world is a big place, and they want to see it!

FrontStreet Coffee Recommendation

If this journey from cherry to auction lot has you craving a Kenyan cup, FrontStreet Coffee's Kenya "Cherry Tomato" is the one to try. A washed specialty lot from the Thika region, grown at 1,550-1,750 meters on the classic SL28 and SL34 varieties, it gets Kenya's signature 72-hour double washed fermentation — the very process described above — to fully unlock the fruit while keeping the cup pristine.

Roasted light to preserve its vibrant acidity and layered fruit, the dry fragrance alone offers dried cherry tomato and floral notes. In the cup: clear cherry tomato and dark plum flavors with bright, solid acidity like freshly squeezed juice, a sweet mid-palate laced with snow pear and black plum, and a long, clean finish of yellow sugar and gentle green tea. Sweet-and-tart balance with unmistakable Kenyan identity — best brewed on a V60, whose fast, unobstructed extraction showcases exactly this kind of vivid fruit and floral character.