I am wanting to stack a small rectangle cake on a 9x13. How would I do this? Would I put the small cake on a board or can I just sit it on top? Do I crumb coat as one cake and ice it or individual?
Thanks,
Molly

You can just set it on top as boards and supports aren't generally required except for every 4" of cake height, however, a board is necessary if you are going to ice them individually to make it possible to transfer to the 9x13.