However, this time it will be about 3 hours between when I leave my house with the cake and when it's served. Someone told me to use an all-shortening buttercream w/artifical butter-vanilla flavor, and not to refrigerate the cake. I did a test run and I don't like the taste AT ALL. And I'm pretty scared of leaving the cake out- how far in advance can you do the cake then? I make my own marshmallow fondant.
Any help or advice would be much appreciated!!