Keep leftover Halloween Appetizers Pumpkin in an airtight glass container in the refrigerator for up to 3 days. Freezing isn't ideal because the cream cheese filling can lose its smooth texture after thawing. If you freeze them, wrap each stuffed pepper tightly and use them within 1 month. Reheat the appetizers at 325°F for 8 to 10 minutes until the filling warms through. Add a small sprinkle of fresh chives after reheating to refresh the flavor. Discard any pieces with watery filling, sour aromas, or a slimy pepper surface.