Coconut White Cake
If you don't have buttermilk on hand, substitute sour milk in the same amount. For the 1-1/3 cups of sour milk needed, place 1 tablespoon plus 1 teaspoon lemon juice or vinegar in a glass measuring cup. Add enough milk to make 1-1/3 cups total liquid; stir. Let the mixture stand for 5 minutes before using it in a recipe.