Tarhana: A Winter Staple Prepared in Summer

What Is Tarhana? A Winter Soup Preserved in Summer

In late summer, courtyards across rural Anatolia fill with the same scene: small pieces of dough drying under the sun on wide cloths. This is the final stage of tarhana, a dried fermented staple that becomes a bowl of soup once winter arrives.

Tarhana is made by mixing yogurt or ayran (a diluted yogurt drink) with wheat flour or cracked wheat, along with tomatoes, peppers, onions, and herbs such as mint or thyme, then letting the mixture ferment for several days. The fermented dough is broken into pieces, dried, and ground into a shelf-stable powder that keeps for months.

The Fermentation Behind the Flavor

Lactic acid bacteria from the yogurt convert sugars in the dough into lactic acid, lowering the mixture's pH to roughly 3.4-4.2. This acidic environment slows the growth of spoilage organisms while helping preserve the milk proteins, the same principle behind yogurt and sourdough preservation.

The dough is typically left covered for several days, kneaded and aired periodically, before it is broken up and dried. Once dried to a moisture content of around 6-10 percent, it is ground into the fine powder most commonly sold today.

Regional Variations, from Powder to Maraş's Reed Mats

Recipes vary widely by region. The most common form is powder tarhana, fully dried and ground; some areas keep it coarser, known as göce or pounded tarhana, which gives soup a different texture. Reducing the tomato and pepper and increasing the yogurt produces a paler "white tarhana."

Kahramanmaraş's version stands apart: the yogurt is mixed in raw, without boiling, into cooked cracked wheat, then spread thin on reed mats called çığ to dry. Maraş Tarhanası is registered as a protected designation of origin with the Turkish Patent and Trademark Office (registration No. 154, since February 2012) and gained European Union geographical indication protection in December 2023.

Storage and Signs of Spoilage

Tarhana keeps for a long time only if it is fully dried before storage; any residual moisture leaves it vulnerable to mold even in powder form. It should be kept in a cool, dry place in cloth or paper bags that allow airflow.

Clumping, darkening, visible mold spots, or a sour, musty smell are signs the product has absorbed moisture and should not be eaten.