If the cake is properly supported, the cake beneath shouldn't be carrying any of the load of the cake on top, so theoretically a stacked cake should be able to be held indefinitely. I deliver all of my cakes stacked - I use bubble tea straws for support and a center dowel rod for any tiered cake. And I always refrigerate and travel with the cake cold. I know this info is coming to you later than you need it, so I hope everything goes (or went) well for you!
6/13/14 at 6:58am