HOW DO I STORE FROSTING?
If you don’t use all of your frosting right away or you’re making it ahead of time, you can store it in an airtight container in the refrigerator. To use the frosting after storage, remove the container from the refrigerator and allow it to come to room temperature before adding it to your dessert. Buttercreams may need to be re-whipped to achieve a soft and spreadable consistency after refrigerating.
For longer-term frosting storage, place the frosting in a freezer-safe bag and store it in the freezer for up to three months. Before using it to frost cakes and cookies, let the frosting thaw in the refrigerator overnight. Bring it to room temperature and give it a quick mix before using.