I was having problems printing the very small bottom pieces of the plain frosting tops from the original cupcake box https://www.thingiverse.com/thing:3477159, so I opened the top and frosting files in sketchup and combined them -- this allows the top to act as a support for the frosting! The photos show the top and frosting combined in bronze (on the left), and as separate pieces as the original in silver (on the right)
top_and_frosting.stl | 28.5MB |