Ghostbusters Cake. Red Velvet Cake with Swiss Meringue Buttercream. Fondant/gumpaste and modeling chocolate accents. The Ghostbusters Cake Topper was made by tracing the design backwards onto paper with a pencil and then flipping it over and tracing over it in pencil again onto the fondant. I only had to press lightly, but definitely use the pencil again or else the image won't transfer. Then I cut the design out and painted it! Loved how it turned out, very easy!