Recipe Notes:
Storage: Leftover frosting can be stored in an airtight container in the refrigerator for up to 1 week. Let it come to room temperature and re-whip before using.
Consistency: If the frosting is too soft, add a bit more powdered sugar. If it's too stiff, add a little more cream, 1 teaspoon at a time.
Shelf Life: Frosted cookies can be stored at room temperature in a single layer for up to 3 days or refrigerated for up to 5 days in an airtight container.