This Homemade Rainbow Birthday Cake was the first cake with a frozen buttercream transfer I made. I made 2 box mixes to make sure I had enough batter. I divided the batter into six bowls and dyed them, red, orange, yellow, green, blue and purple. The best cake mix to use is obviously white.
I took 2 9 inch round cake pans and in the first one the order from first to last was: red, orange, yellow, green, blue and purple. In the other 9 inch round pan the order was: purple, blue, green, yellow, orange and red.
I made the frozen buttercream transfer and put the colors in rainbow order from red to purple. All the icing is buttercream. I love how it turned out. My daughter’s loved it! This is a cake that any child would like. This can also be done with cupcakes, just scoop each color in rainbow order. Awesome!