I think if you leave gumpaste and/or fondant on buttercream for too long, it softens. So, if you have pieces that are not flat, they will lay flat after a while. I had that happen with some butterflies I made for a cake. I dried them for 2-3 days prior to needing them. When I got the cake to the site, they were laying flat on the buttercream.
Thanks, crl. So, I was thinking of transporting the gumpaste decorations in a separate container than the cake and putting them on at the party. It would probably be 1-1 1/2 hours before the cake was eaten. Do you think I'll have problems with a time-frame that short?
Another using gumpaste on b/c thread:
http://www.cakecentral.com/cake-decorating-ftopict-614661-.html
HTH
dmich -
I think you might have problems. I think my cake sat for about the same time. It wasn't a big deal for me as the butterflies just laid flat instead of 3 dimensional. If your gumpaste pieces aren't going to be laying flat against the cake, I would wait as long as possible before you attache them.
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