Bake your favorite cupcake. (I used birthday cake theme.)
Make your favorite milk shake, unwrap the cupcake and place it inside on top. Works great. Nope, it does not sink. (Again, birthday cake flavor for me.)
The milk shake requires about 2 cups of vanilla ice cream and 1 and 1/2 cup of skim milk blended in the blender. Cupcake sprinkles added for color.