Since I knew we wanted a rainbow cake, I decided it was easier to make from scratch than try to have one made somewhere. I mixed up a standard white cake mix and divided it into 3 equal portions (I did this twice for a total of 6 rounds). Color as you like and bake them up. Then layer with a white buttercream icing. It really was an easy cake to make. You can view all posts about our Rainbow Party here.
