Hello Lesly, I have not tried freezing the cake with the frosting before. You are welcome to try it but it will be an experiment. You can freeze the cake, wrapped tightly in plastic wrap, and then keep at room temperature before frosting.

The storing would be the issue to prevent drying out. However if you have a large pan, you could store it in there and wrap with plastic wrap. I would store at room temperature if you do not have a container that is sealed.

Hi Carolyn, it is not a dumb question. It will be enough but you can always bake the first number and see if you want to bake another one with the remaining batter.