I have searched in the recipe section for recipes and I guess I have found a recipe that will work, but I'd like your opinion before I try it.

So, I'm doing a cake for this Saturday. It's a sheet cake with a 3-D Elmo on top with fondant decorations and a fondant "present cake" sitting in front of elmo. My client wants a whipped icing.

I found the wilton 2-part whipped buttercream which seems to be my best bet. I need a "whipped icing" that is going to hold up to fondant decorations, able to be piped, and hold up another cake sitting on top. Also, I cant' refrigerate it because of the fondant decorations. Oh, and it's for a birthday party that's going to be outside.

Any suggestions? thanks in advance!