Leftovers: If you're not going to eat all the buns within 24 hours of baking, it's best to keep these buns in the freezer. Do not store in the fridge because they will go stale. Soften leftover buns by wrapping them in a damp, but not sopping wet, towel, then baking on a cookie sheet at 200°F for 5-10 minutes. Alternatively, microwave them in 10-second bursts until softened. Freezing: Seal the baked and cooled pretzel buns in a zip-top freezer bag or airtight container. Freeze for up to 1 month for best freshness. See the question below for defrosting instructions. Defrost: Bake from frozen at 350°F for 20 minutes, or until defrosted.Alternatively, microwave individual ones for 30-60 seconds, until warm.