Ya, but if you going to use your refrigerator, please set the temperature in the high 40s or 50s. Your food will spoil, but your cake will have the least risk of condensation. At this temperature your butter cake will last several days. When you take the cake out of the fridge, you must place your cake in an air conditioned room, so the air is dry. Running a dehumidifier is a good idea, too. Once the cake has reached room temperature, then you can place it on a non-air conditioned environment.