My brother has asked for a X O wedding cake. It is a large X with an O behind, both upright on a ceramic cake stand. The image shows it covered in royal icing, and I know royal icing is going to help with the structure of the cake, but I am still worried about how to make this cake! any suggestions?
I would definitely stack more like this (this is not a real cake 
):
http://tinyurl.com/74wz8n4
than simply turning a flat cake upright.
Thankyou for your help! I have had a bit of a fiddle with your suggestions and with the weather warming up and the lack of support for the cake I am worried the ganache will soften and the cake fall. I have decided to go with styrofoam. I thought maybe putting a bit of cake at the bottom of the 0 so they could cut it, but my brother has decided to have it sitting on top of another cake, so the whole thing will be styrofoam. Once again, I appreciate your advice, and will keep it in mind for future projects!
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