Source: Midwest Living
To make 1/2 cup sour milk, place 1-1/2 teaspoons lemon juice or vinegar in a glass measuring cup. Add enough milk to make 1/2 cup liquid; stir. Let the mixture stand for 5 minutes before using it in a recipe.
205 calories; 7 g total fat; 32 mg cholesterol; 219 mg sodium. 34 g carbohydrates;