MursikSmoky fermented milk
When Kenyan marathon runners land back in Eldoret, relatives greet them with a gourd of mursik, the soured milk of Kalenjin homesteads across the Rift Valley highlands. Traditionally, milk sits for several days in a sotet, a long calabash whose inside has been scraped with a smouldering stick of senetwet (the tree often called the cromwell tree) so a lining of fine charcoal coats it; that charcoal gives mursik its smoky taste, grey flecks and long keeping. At home we skip raw milk and a wild ferment: pasteurised milk is soured with a live cultured buttermilk, and a jar smoked inside with untreated hardwood, or a pinch of food-grade activated charcoal, brings the flavour. Thick, sharp and smoky, it is drunk with ugali, sweet potatoes or after a long run, and the usual mistake is fermenting it somewhere too hot, where it splits into whey and tastes yeasty. Chef's tip: shake the jar hard before pouring, as herders shake the gourd, to make it smooth and drinkable.
























