26-08-2009· For my gift box cake, I basically used a cake pan to build the lid on. Invert the cake pan. Dust the bottom with corn starch. Roll out your gumpaste and lay it over the inverted cake pan. Smooth out the gumpaste. Use a sharp knife to trim the sides of the gumpaste. Build the bow directly on top of the lid. Let the entire thing dry on top of the cake pan.