If you don't have buttermilk on hand – here's an u003ca href=u0022https://allthings-mamma.com/baking-and-food-substitutions/u0022u003eeasy hacku003c/au003e!  You can make DIY buttermilk easily! Add 2 tablespoons of vinegar or lemon juice to a measuring glass. Add whole milk to equal 1 cups.  Give it a stir and let sit 5-10 minutes in order to activate.