I always used this in the Texas Sheet Cake recipe when it called for buttermilk.
For 1/4 cup sour milk or sour cream, place 1 teaspoon vinegar or lemon juice in cup measure.
Add milk or cream to 1/4 cup level.
Let stand five minutes before using.
For 1 cup of sour milk or sour cream, use 1 tablespoon vinegar or lemon juice.
Add milk or cream to 1 cup level.
Let stand at room temperature for 15 minutes or so.
For 1/4 cup sour milk or sour cream, place 1 teaspoon vinegar or lemon juice in cup measure.
Add milk or cream to 1/4 cup level.
Let stand five minutes before using.
For 1 cup of sour milk or sour cream, use 1 tablespoon vinegar or lemon juice.
Add milk or cream to 1 cup level.
Let stand at room temperature for 15 minutes or so.