Quroot ([ قروت Dari قروت), also called Kashk (Iran) is a reconstituted yogurt product. The hard & sour Quroot is popular in Central Asia

Central Asia

Central Asia is a core region of the Asian continent from the Caspian Sea in the west, China in the east, Afghanistan in the south, and Russia in the north...

n nations such as Afghanistan

Afghanistan

Afghanistan , officially the Islamic Republic of Afghanistan, is a landlocked country located in the centre of Asia, forming South Asia, Central Asia and the Middle East. With a population of about 29 million, it has an area of , making it the 42nd most populous and 41st largest nation in the world...

, Iran

Iran

Iran , officially the Islamic Republic of Iran , is a country in Southern and Western Asia. The name "Iran" has been in use natively since the Sassanian era and came into use internationally in 1935, before which the country was known to the Western world as Persia...

 and Tajikistan

Tajikistan

Tajikistan , officially the Republic of Tajikistan , is a mountainous landlocked country in Central Asia. Afghanistan borders it to the south, Uzbekistan to the west, Kyrgyzstan to the north, and China to the east....

. 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 .

Quroot is typically eaten raw, and may be served with cooked Afghan dishes such as Ashak, Mantoo, and Qeshla Qoroot, among others.