Share the delicious soups expertly prepared by Knorr chefs with all your loved ones at your table. Tarhana is a dried food ingredient, based on a fermented mixture of grain and yoghurt 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.