Kenya Kiambu Yara Peaberry AA Coffee Beans

If you’ve ever tasted a bright, juicy Kenyan coffee and wondered what makes it so distinctly vibrant—think deep blackcurrant, citrus zest, and a wine-like acidity—you’re likely experiencing the effect of both high altitude and unique variety. But not all Kenyan coffees are the same. Some stand out more than others due to rare processing, microclimates, and even a quirky mutation in the coffee cherry itself. One such example is the Kenya Kiambu Yara Peaberry AA.

The Kenya Kiambu Yara Peaberry AA is a high-quality single-origin lot grown at 1732 metres above sea level, processed using the washed method, and featuring the sought-after SL28 and SL34 varieties. It’s classified as AA—the highest grade in Kenya—and exhibits classic Kenyan cup traits with a twist: it’s a peaberry.

What Is a Kenya Peaberry Coffee?

A peaberry occurs when a coffee cherry produces just one rounded seed instead of the usual two flat beans. This happens in roughly 5% of all coffee cherries. The single seed receives all the nutrients, often resulting in a denser bean with more concentrated flavours. While peaberries can appear in any origin, they’re sorted and sold separately, sometimes fetching a premium.

Kenya Kiambu Yara Estate: The Farm Behind the Bean

The Yara Estate is located in Kiambu County, approximately 23 kilometres north of Nairobi. At 1732m above sea level, the estate enjoys cool temperatures and annual rainfall between 988–1300mm—ideal conditions for slow cherry maturation. The farm sits on well-drained, deep red soil rich in organic matter. Originally established as a livestock operation in 1902 by British immigrant Edward, coffee cultivation began in 1930, and by 1971 the land was taken over by the Gatatha Farmers Co-operative Ltd., focusing entirely on coffee and tea. The estate also grows tea near the homestead and maintains livestock at lower elevations. Native acacia trees provide natural shade, and wildlife such as antelope, monkeys, and porcupines inhabit the area. The farm is in the process of obtaining Rainforest Alliance certification.

Why SL28 and SL34 Varieties Matter

The Yara Estate grows the famed Kenyan coffee varieties SL28 and SL34, developed by the Scott Laboratories (SL) in the 1930s. These cultivars were selected for their ability to thrive at high altitudes and for their exceptional cup quality. SL28 is known for its pronounced blackcurrant, citrus acidity, and wine-like complexity. SL34 brings a more balanced fruit acidity with hints of nuts and spices. Together, they form the backbone of Kenya’s signature cup profile—bright, juicy, and layered with complexity. Their performance at high elevations like Yara’s enhances their natural attributes, producing a vibrant and structured acidity, dense body, and lingering sweetness.

Washed Processing: The Kenyan Way

Kenya is renowned for its meticulous washed processing. At estates like Yara, ripe cherries are carefully handpicked, then pulped to remove the skin. The sticky mucilage is broken down through controlled fermentation for around 48 hours, after which the beans are washed to remove all remaining fruit residue. They are then soaked in clean water for another 24 hours to ensure purity. This multi-stage washing process results in a coffee with intense fruit flavours, high clarity, and a clean, sweet finish. The combination of peaberry formation, elite varieties, and precision processing contributes to the Yara Peaberry AA’s exceptional profile.

Flavour Profile of the Yara Peaberry AA

The Kenya Kiambu Yara Peaberry AA delivers a cup dominated by dark fruit notes, with tasting notes of raisin, citrus acidity, and a sweet undertone of guava and grapefruit. The bright acidity is reminiscent of fresh citrus, while the body carries the weight and texture expected from high-altitude Kenyan beans. The interplay of sweet and tart makes it particularly suited for pour-over or Aeropress brewing, where its clarity and complexity can truly shine.

Frequently Asked Questions

What is a peaberry coffee bean?

A peaberry is a single round coffee bean that forms inside the coffee cherry instead of the usual two flat beans. This occurs in about 5% of cherries when only one seed is fertilised. Peaberries are often separated and sold as a distinct grade due to their typically denser structure and more concentrated flavour potential.

Where is the Yara Estate located?

The Yara Estate is in Kiambu County, about 23 kilometres north of Nairobi, Kenya. It sits at an elevation of 1732 metres and benefits from fertile, well-drained red soil and consistent rainfall between 988 and 1300 millimetres annually.

What coffee varieties are grown at Yara Estate?

Yara Estate grows the SL28 and SL34 coffee varieties, which were developed by Kenya’s Scott Laboratories in the 1930s. These varieties are prized for their ability to produce complex, high-acidity coffees with distinctive fruit and wine-like characteristics, especially at high altitudes.

How is Kenyan coffee processed?

Kenyan coffee, including the Yara Peaberry AA, is typically processed using a washed method. This involves removing the coffee cherry skin, fermenting the mucilage for around 48 hours, washing it off, and then soaking the beans in clean water for an additional 24 hours to ensure cleanliness and enhance cup clarity.

What does AA mean in Kenyan coffee grading?

In Kenya, AA is the highest grade of coffee bean, referring to the largest and densest beans that are typically sorted by size through screens. These beans are often associated with higher cup quality, greater brightness, and more complex flavour profiles.

What does the Yara Peaberry AA taste like?

The Yara Peaberry AA offers flavours of dark fruit, raisins, and citrus acidity, along with sweet notes of guava and grapefruit. It has a bright, wine-like acidity and a heavier body typical of high-altitude Kenyan coffees.

Recommended FrontStreet Beans for Peaberry Fans

The Kenya Little Tomato from FrontStreet Coffee is a top pick for fans of bright, complex Kenyan coffees. It highlights the SL28 and SL34 varieties with intense notes of tomato, bergamot, grapes, and plum—offering a juicy, high-acid cup that mirrors the profile of Yara Estate peaberries. For another excellent option, try FrontStreet’s Classic Blend, which balances Kenyan acidity with other regional strengths. Both beans showcase the vivid fruitiness and precise processing that define top-tier Kenyan coffees. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.