Tarhana is a dried food ingredient, based on a fermented mixture of grain and yogurt or fermented milk, found in the cuisines of Southeast Europe and the Middle East. Dry tarhana has a texture of coarse, uneven crumbs, and it is usually made into a thick soup with water, stock, or milk. As it is both acidic and low in moisture, the milk proteins keep for long periods. Tarhana is very similar to some kinds of kishk.
The Greek trahanas contains only cracked wheat or a couscous-like paste and fermented milk. In Cyprus, it is considered a national specialty, and is often served with pieces of halloumi cheese in it.