It's very easy to make your strained yogurt at home. It is also known as thick yogurt or süzme yogurt in Turkish. Use a simple strainer, a bowl and a muslin.
Put the strainer over a large bowl. The bottom of the strainer shouldn’t be touching the bottom of the bowl.
Place the muslin in the strainer. Pour the yogurt into it. Bring the sides of the layers together on the top.
Put them together in the refrigerator. Yogurt will drip its excessive liquid (whey) into the bowl. Let it sit in the refrigerator for 4-10 hours. Check it after 4 hours. If it is thick enough, you can transfer it to a container. If you want it thicker, let it sit longer.
Store it in a jar or another container in the refrigerator for up to 3 weeks or until the expire date of the yogurt you use.
NOTES
Don’t try to squeeze the bag or muslin in which you put the yogurt. It has to drip the excessive liquid, so it needs time.
The longer you strain, the thicker it gets. So you can check and stop straining when you are happy with the thickness.
If you are planning to use store-bought yogurt, read its label and make sure it doesn’t have modified corn starch as a thickener. It is hard to strain it because the liquid won’t separate.
You get about 1 cup of thick yogurt from 4 cups of regular yogurt but this might change depending on the brand and how runny the regular yogurt you are using is.
You can use the whey removed from yogurt in baking as a substitute for milk, yogurt or water, especially for breads.