Duncan Hines Shield Logo

Rainbow Birthday Cake

White cake dyed with food colouring to make a rainbow surprise birthday cake.


  1. Prepare cake batter as per box directions, divide each into 3 small bowls, 6 total
  2. Add a different food colour to each bowl (I used red, orange, yellow, green, blue, purple)
  3. Pour 3 colours of batter into each of 2 13x9 cake pans and bake as per directions on box
  4. Once cooled frost and layer cake
  5. Use grater to grate chocolate bar and apply to sides of cake
  6. Cut mini chocolate/peanut butter cups into quarters and apply to bottom and top border
  7. Or decorate as desired.