How to prep and store cake layers in advance
If you plan ahead and bake cake layers in advance it can make the job of assembling a layer cake easier! I usually bake all cake layers at least one day ahead of when I plan to build and serve the finished cake.
After the cake layers are baked let them cool in the pan 5-10 minutes, then transfer them to a wire rack to cool completely. Wrap them individually in plastic wrap and store in the fridge for up to 3 days, or double wrap in plastic and store in the freezer for 1-2 months. Thaw frozen cake layers in their wrappings before frosting, either overnight in the fridge or at room temperature for a few hours.