If you don't have buttermilk, you can make your own! Add 1 tablespoon of white vinegar (or fresh squeezed lemon juice) to 1 cup of room temperature milk (full cream, 2% or skim can be use). Mix together and let sit for 5 minutes. Done! Prepare your 'buttermilk' as step one of this recipe to ensure it has soured enough before adding to your mixture.