AOk, I'm doing 2 tall christening cakes. A 6" and an 8". Both will be double height (8") and I'll be using cake boards and dowels for support.

Question Do I just ganache the bottom cake, put the supports in, and pop the second cake ( on a board) on top? What happens when it's cut? Won't the ganache make a sticky mess when separating the two cakes? Or do I not ganache the top of the bottom cake? Or do I put a thin layer of fondant in?

I think I just answered it my head.... No ganache (well just a blob to stick it)

Thanks!!!!!!!!!! Any tips would be great!

A Baker I know when stacking her cakes puts wax paper on top of the first cake (the size of the cake circle that goes on top) and then stacks the second so as to preserve the ganache when the cakes are separated. You can secure both cakes more by running a (sharp) dowel down the center of both going through the board of the first, wax paper, cake board and base. Hope that helps.