Note: If you don't have buttermilk, you can make it by putting 1 tablespoon of either white vinegar or lemon juice in a liquid measuring cup and adding whole milk so that the total amount is 1 cup. Gently stir and let it sit for about 5 minutes and it will be ready to use. For this recipe, you will need two cups of buttermilk, so you would need 2 tablespoons of white vinegar or lemon juice and enough milk to added to that to get to 2 cups.