AI've been asked to make a Minnie Mouse cake this weekend. It needs to have black Minnie silhouettes around the outside edge with pink bows, as well as ears on top. I don't work with fondant, so I'm trying to decide how best to do these. It'll be an outside party, 74 & humid. I can do royal icing but am concerned about putting them flat or upright on a buttercream cake, will they dissolve? Or modeling chocolate, but don't know how much heat that can take. Thoughts?

..........concerned about putting them flat or upright on a buttercream cake, will they dissolve?......

NO they will not.  I've done it many times.  Coat the back of the piece w/a thin layer of white chocolate - now you can either lay them flat on the cake or stand them up using sucker sticks or such for support.

AAh, great idea! Thank you!