I am so excited about this cake!
I have always LOVED sprinkles, all the colors just make you happy. Underneath the sprinkles and buttercream is another rainbow cake--I can't resist, they are so impressive when you cut into them :) I love doing the lettering too. I just melted the white chocolate and piped it onto some wax paper.
My little girls can't help but get into the pictures, they get more excited about the cakes than even I do :D
