When I saw these rainbow candies at a candy store in St. Augustine a few days ago, I got all excited about using them to decorate St. Patrick's Day cupcake. As it turns out, though, they don't really hold their shape very well. They are too thin and floppy to be a good stand-up rainbow, but I'm sure they'd be fine on the side of a cake.
Here is what I came up with:
fondant coins and gold glitter gel in the center of a chocolate cupcake.
I have read that a variety of colors of "Airheads" candies, sliced length-wise and formed into rainbows is much more successful for this sort of thing.