When your cake has cooled, wrap any leftovers tightly in plastic wrap or foil, or place it in an airtight container. It will last at room temperature for up to 5 days (provided your environment is not too warm) or in the refrigerator for up to 7 days. To freeze, cut the bread into individual slices and separate them with sheets of parchment. Make sure they are wrapped well or place them in a sealed container and freeze for up to a month. To defrost, let it thaw at room temperature for a couple of hours.