First: is there a way to make only part of a batch of royal or what else should I use?! ALL I need to do is attach the heel to my shoe for this cake for tonight. The shoe is already dry (50/50 fondant/gumpaste).
Second: Have you ever heard of actually mixing the filling with buttercream? Like I am using a raspberry filling and he said he has had it mixed with the buttercream, do I use a 1:1 ratio, 2:1?! I am confused. If I can't mix them I will just put a layer of frosting then filling then frosting on the bottom side of the top layer. . .
Thanks so much!
If the surfaces of the gumpaste are flat enough to stick together, you can glue them with some tylose mixed with water. If they have a space that needs to be filled in, then you'd want to use royal.
I would mix the filling with the buttercream instead of using a layer of buttercream and a layer of filling...that makes a very slippery cake, which I learned the hard way 
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