Ingredient Substitutions: You can use whole milk or almond milk in place of buttermilk, but be sure to add a tablespoon of vinegar or lemon juice for acidity. Optional Variations: Add chocolate chips, cinnamon, or even a pinch of cayenne pepper for a kick to the dough for different flavor profiles. Storage or Reheating Tips: Beignets are best enjoyed fresh, but you can store leftover ones in an airtight container for up to 2 days. Reheat them in a toaster oven for a few minutes to regain their crispiness.