I?ve been doing so much buttercream that I FORGOT to make my buttercream undercoat stiffer for the fondant application and ended up with a mountain instead of a cake! So I had to do it over ? halving the liquid in the buttercream to get the sharp edges with the fondant (with buttercream undercoat). I rolled the fondant thinly and applied it to the stiffish buttercream iced cake and used a crimping motion with two fondant smoothers to get the edges sharp. This was a lemon cake with lemon curd filling, buttercream undercoat and fondant finish with fondant flowers and accents.