Line a colander with 2 layers of cheesecloth or 1 layer of muslin and set in a larger bowl, elevating the colander at least 1 inch from bottom of bowl. Spoon 1 quart plain nonfat yogurt (made without gelatin) into cloth. Seal bowl and colander with plastic wrap. Chill for 2 to 4 days, discarding the liquid whey as it accumulates. Use the cheese or scoop into a container and store airtight up to a week; freeze to store longer. Drain whey before using cheese.
Nutritional analysis per 1/2 cup.