After opening a can of pumpkin puree, its shelf life depends on how you store it. Once opened, canned pumpkin should be transferred to an airtight container or covered with plastic wrap and stored in the refrigerator. Under these conditions, canned pumpkin can typically last for about 5 to 7 days.
Make sure to check for any signs of spoilage, such as mold growth, off odor, or changes in texture before using the pumpkin puree. If you notice any of these signs, it's best to discard it, as consuming spoiled food can lead to foodborne illness.
If you don't plan to use the entire can of pumpkin within a week, consider portioning it out and freezing the leftovers in a freezer-safe container. Frozen pumpkin puree can last for several months and can be thawed and used in future recipes. Just remember to leave some space in the container for expansion during freezing.