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Please can tell me, if you can use fruit cakes to make the Topsy Turvy Cake?

I would use carrot cake or sultana.if you plan to carve.fruit cake will crumble.and is heavy.you may be ok with topsy turvy shaped tins.you could probably hire them

Hello GeeKay

If you look here http://www.cakeflix.com/questions/covering-rose-cupcake-bouquets, there is an answer to your original question.