Scoop leftover pumpkin into a plastic container, seal it and it will last for 1 week in the refrigerator and up to 3 months in the freezer. If you’re freezing it, leave a bit of room at the top of the container for the pumpkin to expand when frozen. When the pumpkin thaws it may appear to separate due to air bubbles—this won’t affect its taste or texture in your recipes.
One handy suggestion would be to spoon pumpkin in ice cube trays and freeze. Once frozen, pop cubes out and transfer into a freezer-safe storage bag or container and freeze up to three months. Defrost individual cubes as needed.
Also try storing pumpkin in mini silicone muffins cups. Once frozen, pop cubes out and transfer into a freezer safe storage bag or container and freeze up to 3 months. Defrost individual cubes as needed.