The inside is a funfetti boxed cake mix (to match the tye-dye of course). The icing is just a buttercream. I used a large star border around the outside and simply drew on all the symbols. The tye-dye was created using colored piping gels and then dragging them out using a toothpick. Next time I think I will buy more than just one tube of piping gel in each color so that I can make the design larger. It took a lot of gel to make the thick concentric circles.
I was initially going to make something for the 4th of July this weekend (I like the firework cupcakes on Wilton), but I think we decided to just do some homemade icecream instead. I may try the cupcakes later though because they really are adorable.
Hope everyone has a wonderful 4th of July!