Rainbow Layer Cake recipe from Betty Crocker. 2 boxes vanilla cake mix divided and colored with gel food coloring. Idea from comments: Use regular whipped canned frosting for middle layers and Cool Whip refrigerated frosting for the outside.
These Rainbow Cupcakes are made with a simple boxed white cake mix, colored, and layered to make a rainbow, with whipped cream cheese frosting on top! (Photo tutorial, plus tips on baking cupcakes to perfection!) ANYTHING RAINBOW IS AWESOME !