A 15 oz can of pumpkin puree generally holds just shy of 2 cups. As you only need a ⅓ cup of pumpkin puree for this recipe, we recommend freezing leftovers in case you are not planning on using it right away for other recipes. Take a look at your favorite pumpkin recipes and measure out leftover pumpkin puree according to needed amounts. Then freeze in freezer safe containers. Just pull out the frozen pumpkin puree the night before you are planning on using it and let thaw overnight.