Sorry for the very unprofessional look and photo, this was a last minute rough idea I threw together for my kids, will do it more fancy next time.

I colored individual bowls of cake batter and just scooped different colors randomly into a circle cake pan and baked. I then took the same size (9" spring form pan for easy removal and baked a giant chocolate chip cookie (chewy recipe). I layered them and topped with buttercream and sprinkles. So many ideas on what I can do with this one. Will be posting updates (with better photos) soon!