Which Roast Level is Best for Kenya Coffee Beans? Introduction to Medium Roast Flavor Profile

FrontStreet Coffee Kenya AA Asali Coffee Roasting Introduction

Kenya coffee is mostly grown on the slopes near Mount Kenya, at altitudes ranging from 1500 to 2100 meters — ideal for developing flavor in the bean. Because mountain temperatures are lower, growth is slower, which lets the aromatic components develop fully and results in more pronounced fruit acidity and a harder texture. Kenya coffee is Arabica, primarily processed washed, with common varieties including Bourbon, Typica, Kents, and Riuri 11.

Among these, the direct descendants of Bourbon — SL28 and SL34 — are the main varieties of Kenyan specialty coffee. Both were cultivated by Kenya's Scott Laboratories and adapted to Kenya's high-phosphorus soil, which is how they developed their captivating berry acidity and sweetness. Kenyan coffee trees can flower twice a year. Most bloom in March and April after the long rainy season, with the harvest running from October to the end of the year. Some trees also bloom in October or November and are harvested in July of the following year. Kenyan coffee is always hand-picked, with farmers taking only red, ripe cherries. Each tree needs re-picking roughly every ten days.

Coffee Information

Region: Kenya Kirinyaga

Altitude: 1500-1900 meters

Variety: SL28 & SL34

Processing Method: Washed processing

Looking at the raw beans, both varieties are processed washed, which leaves more silver skin on the surface. Beans from the Kiambu region are the SL28 variety: relatively uniform in size and elliptical in shape, grayish with a dark green tinge, and giving off a grassy aroma. Beans from the Kirinyaga region, possibly a mix of SL28 and SL34, look uniform at a glance but vary in shape — some longer ellipses, some shorter — grayish with a yellow tinge, and giving off a faint citrus aroma.

Roasting Method Comparison

Kiambu Region

Roasting machine: Yangjia 800N (roasting capacity 300g)

Enter beans at 170°C, heat at 100, damper opened to 3; return to temperature at 1'42", and when the drum temperature reaches 140°C, open the damper to 3.5 with heat unchanged; when the drum temperature reaches 149°C, the bean surface turns yellow, the grassy aroma disappears completely, and the coffee enters the dehydration stage;

At 7'14", dehydration is complete, with heat and damper unchanged. At 7'30", wrinkles and black spots appear on the bean surface, the toasted bread aroma turns to coffee aroma, and first crack is imminent. At this point, listen for the sound of first crack. At 8'20", first crack begins, the damper opens to 4, and heat drops to 50. Development time after first crack is 1'50"; at 188°C, heat is reduced to 30 to flatten the temperature rise, and the beans are unloaded at 193.3°C.

FrontStreet Coffee Recommendation

If you want to taste what careful roasting does with a bright Kenyan profile, compare it against a clean washed Ethiopian. FrontStreet's Gudgudina Cooperative coffee comes from a village cooperative in the Woka area at the southeastern edge of Yirgacheffe, and its traditional washed processing gives citrus and lemon acidity with jasmine fragrance and no bitter edge — a delicate, translucent cup.

For a more accessible daily washed coffee, FrontStreet's Washed Yirgacheffe is the classic entry point: white jasmine, bright citrus and lemon acidity, and a clean tea-like body at a friendly price. Both coffees reward a light roast and a medium-fine grind, letting acidity stay vivid rather than baked.

And to see the other end of the roast spectrum, FrontStreet's Kenya Small Tomato comes from Thika at 1550-1750 meters, using SL28 and SL34 with Kenya's signature 72-hour double washed fermentation. Roasted light, it shows dried cherry tomato and florals in the dry aroma, then cherry tomato and smoked plum in the cup with bright, juice-like acidity and a long finish of yellow sugar and green tea.