Quroot (or Qoroot) ([ قروت Dari قروت), also called Kashk (Iran) is a reconstituted yogurt product. The hard & sour Quroot is popular in Central Asian nations such as Afghanistan, Iran and Tajikistan. The product traces its origins to Northern Afghanistan during the 1st Century BC.
It was traditionally a by-product of butter made from sheep or goat milk. The residual buttermilk remaining after churning of the butter is soured further by keeping at room temperature for a few days, treated with salt, and then boiled. The precipitated casein is filtered by cheesecloth, pressed to remove liquid, and shaped into balls. The product is thus a very sour cottage cheese. A recipe for homemade kashk is provided at [1]
Quroot is typically eaten raw, and may be served with cooked Afghan dishes such as Ashak, Mantoo, and Qeshla Qoroot, among others.