To store leftover Dutch baby pancakes, place them in an airtight container or wrap them tightly with plastic wrap or aluminum foil. You can store them at room temperature for up to two hours, but after that, it's best to refrigerate them. When you're ready to eat them, you can reheat them in the oven at 350°F (175°C) for about 5-10 minutes or until they're heated through and slightly crispy.