Homemade kashkFermented yogurt whey
Kashk began with Iran's nomadic herders, who churned their yoghurt for butter in goatskin bags, then cooked and dried the sour leftover into hard balls that lasted through winter. In Kerman, Fars and Khorasan it is still made that way, but in Tehran most people buy it liquid in jars. Making your own is worth one slow afternoon. It is the salty, sour, almost cheesy finish swirled over ash reshteh at Nowruz, folded into kashk-e bademjan with fried mint and walnuts, and stirred into kaleh joosh on cold nights. Liquid kashk is thick and creamy like soured cream but sharper and saltier; dried kashk is chalky-hard and grates like aged cheese. Common mistake: heating the churned yoghurt fast; it scorches and the curd turns rubbery. Keep the heat low and stir. The curd is ready when it separates into soft white clumps in a clear, yellow-green whey. Kashk is always cooked again before eating — even the jarred kind — so heat it when you use it. Chef's tip: a goat or sheep's milk yoghurt, or half and half with cow's, gives the most authentic, funky flavour.








