Tahn is a type of traditional Armenian dairy beverage made by combining plain yogurt (matzoon) with cold water, salt, and sometimes chopped herbs, sliced green onions, and cucumbers. The ingredients are blended until smooth, with additional water or yogurt until the concoction reaches the desired consistency.
Chilled and refreshing, tahn is a typical drink Armenians consume during the summer heat to quench their thirst. Fresh parsley or mint leaves are added to the drink for flavor or used as a garnish. This savory Middle Eastern beverage resembles Turkish ayran, Indian lassi or majjiga, and Persian kefir or doogh.