Ayran or Airan from Turkish is a mixture of yogurt, water, and salt. It's the most common cold beverage, which may accompany almost all dishes in Turkey.
1 1/2 cup plain yogurt
1 1/2 cup water
1 tsp salt
This is very straight-forward but tastes great:
Put all of the above in a blender. Mix for about 35-40 seconds. Pour into glasses. Also after blending, at the top, you will see bubbles and that’s the best part. Makes 4 portions. The drink shouldn’t be thick.
More about Ayran...
Ayran is so popular in Turkey that it rivals the sales of the juice and soda industries. International fast-food companies, such as McDonald's, include Ayran in their standard menu.
In rural areas of Turkey, ayran is offered as a standard drink to welcome guests.
Ayran is served cool, and is a common accompaniment to döner, kebab, banitsa, gözleme, or pastry. Some forms of fresh ayran are foamy as you can see in the picture.