Has anyone tried using rice crispies as a cake base? I am making a wedding cake and was going to use a dummy for the cake base because it is 16x16x4 and the wedding is for only 50 people. I figured I didn't need so much cake (plus my oven is not large enough to bake such a big cake). I was going to get a cake dummy. However, I can not get it on such short notice. No one in town sells cake dummies. So my next idea was to make a cake base out of rice crispies, cover it in buttercream, then fondant. Has anyone tried it? Will it hold up do you think?
Yes. It should hold. If you're worried about it even a little, my trick is to overcook the marshmallows just a little - till they're about the same color as the rice krispies. The golden brown color means that the sugar is just starting to caramelize and will make very sturdy RKT that aren't too soft for that kind of thing.
You'll have to work with them while they're still warm - because they will get fairly hard when they're completely cool.