Buttermilk

What! you don't like buttermilk, and don't want to buy a whole carton just for one recipe.
Make just what you need.
Recipe for buttermilk:
1 cup milk
1 tablespoon lemon juice or vinegar.
Whisk together, set aside for 5 to 10 minutes until thickened.

This works very well for all your buttermilk recipes.