Do you have to store a chocolate cake with butter icing in fridge?

Chocolate cake with butter icing does not need to be refrigerated. In fact, refrigerating it can cause the icing to become hard and the cake to dry out. It's best to store it at room temperature in an airtight container. If you're not planning to eat the cake within a few days, you can freeze it. Just wrap the cake tightly in plastic wrap and place it in a freezer-safe bag. When you're ready to eat it, thaw it overnight in the refrigerator and let it come to room temperature before serving.