A medium roast is the best all-around roast for Kenyan coffee in a French press. It keeps the bright acidity, blackcurrant fruit notes, and sweetness that make Kenyan beans famous, while adding enough body for immersion brewing.
If you want a smoother, heavier cup, a medium-dark roast works too. If you want maximum origin character, go light to medium-light and brew carefully.
The Short Answer: Medium Roast Wins
Kenyan coffee, mostly SL28, SL34, and Ruiru 11 varieties grown above 1,700 meters, is known for dense beans and intense fruity acidity. A medium roast softens that brightness into a juicy tartness while building sweetness and body through caramelization.
The French press uses full immersion and a metal mesh filter, so oils and fine particles pass into the cup. That rich mouthfeel pairs well with the softened acidity of a medium roast, according to specialty coffee publication Perfect Daily Grind.
According to The World Atlas of Coffee by James Hoffmann, a 2007 World Barista Champion, roasting Kenyan coffee too dark strips away its powerful fruit notes. Roasting too light in an immersion brew can leave a sour, astringent cup.
Medium sits safely between those two failure points. Look for a freshly roasted Kenyan medium roast from a specialty roaster, ideally roasted within the past few weeks.
How Each Roast Level Tastes in a French Press
Use the table below to compare roast levels before you buy beans.
| Roast Level | Flavor in French Press | Acidity | Body | Verdict |
|---|---|---|---|---|
| Light (City) | Lemon, green tea, tart currant; risk of sourness | Very high | Light, tea-like | Only with careful high-temp brewing |
| Medium-light to Medium | Blackcurrant, plum, cane sugar, silky body | Vibrant, balanced | Medium to rich | Best overall |
| Medium-dark (Full City+) | Dark chocolate, molasses, muted berry | Low to moderate | Heavy, creamy | Good for a smoother cup |
| Dark (French/Italian) | Smoky, baker’s chocolate, bitter finish | Minimal | Very heavy, oily | Not recommended for specialty Kenya |
Light roasts can taste sharp or sour in a French press because the long steep lets temperature drop during extraction. Dark roasts lose the berry and floral aromatics that make high-grown Kenyan coffee worth buying in the first place.
If your cup tastes too sharp, go slightly darker on your next bag or steep a little longer. If it tastes flat, go lighter or shorten the steep.
Brewing Parameters for Kenyan Medium Roast
Medium roast Kenyan coffee extracts cleanly in a French press with these starting parameters:
- Coffee-to-water ratio: 1:15 to 1:16, about 30 g of coffee to 450-480 g of water
- Grind size: coarse to medium-coarse, resembling sea salt
- Water temperature: 93-96°C (200-205°F), just off boil
- Steep time: 4 minutes total immersion, then break the crust, skim the foam, and plunge
The Specialty Coffee Association (SCA) has published brewing best practices noting that denser, high-altitude beans like Kenyan lots need sufficient heat during roasting for uniform solubility. Medium roast ranges are optimal for reaching target extraction in immersion systems.
Use the table below to scale your batch size without guessing.
| Batch Size | Coffee (1:15) | Water |
|---|---|---|
| Single mug | 20 g | 300 g |
| Standard press | 30 g | 450 g |
| Large press | 45 g | 675 g |
| Full 34 oz press | 55 g | 825 g |
A 0.1 g digital scale is more reliable than volume measures, since bean density and roast level change how much a tablespoon weighs. For drip machines, the ideal Kenyan roast shifts slightly lighter, and we cover that separately.
A burr grinder set to sea-salt coarseness keeps the extraction even. A quality option like the Baratza Encore handles French press grinds consistently.
Why Grind and Temperature Matter As Much As Roast
Here is the part most guides miss: a bright, acidic Kenyan light roast does not fail in a French press because the roast is wrong. It fails because immersion brewing with no agitation extracts more slowly than pour-over, and temperature drops during the steep.
This means you can partly rescue a light roast with hotter starting water and a finer grind toward the coarse end. The fix for a sour Kenyan cup is often in the brewing variables, not just the roast date on the bag.
Similarly, a carefully brewed light roast in an AeroPress, which is a different story entirely for Kenyan beans, produces a cleaner cup than the same beans in a French press. The mesh filter and steep time of the press are what push the balance toward medium.
If you also brew espresso from the same beans, note that espresso generally calls for a slightly darker Kenyan roast than a French press does.
Troubleshooting by Taste
A sharp, sour cup can indicate under-extraction, common with light roasts brewed too cool. Use hotter water, steep closer to the 4-minute mark, or choose a medium roast next time.
A flat, dull cup can indicate a roast that is too dark for these beans. That chocolatey depth came at the cost of the blackcurrant character you paid Kenyan prices for.
A bitter, ashy cup can indicate dark-roast territory plus excessive extraction. Go lighter and shorten the steep.
Conclusion
Start with a medium roast Kenyan coffee, brewed at 1:15 with 93-96°C water and a 4-minute steep. That single combination delivers the juicy acidity, blackcurrant sweetness, and full body the French press is built for. Buy a small bag of medium-light and medium-dark side by side and taste them back to back to lock in your preference.