TO STORE: Store leftover oatmeal in an airtight container in the refrigerator for up to 5 days.
TO REHEAT: Warm the oatmeal in a microwave-safe bowl with a splash of milk to rehydrate the oats for 30-second increments, stirring after each. You may also warm gently over low heat on the stovetop with a splash of milk until heated through.
TO FREEZE: Chocolate oatmeal may be frozen for up to 6 months when kept in an airtight container. To thaw, transfer the oats to the fridge overnight or warm in the microwave for a few minutes with a splash of milk to rehydrate.