Ultimate Pastry, Savory & Craft Beverage Ingredients

Surprise Rainbow Cake

Posted on 16 March 2020

Amoretti Recipe: Surprise Rainbow Cake

Amoretti’s Food Colors bring Spring to this cake with buttercream in colors of the rainbow. These colors blend beautifully with any frosting, so go ahead and mix it up to suit your mood! Makes one 6" six-layer cake.


  • 6" cake pans
  • large offset spatula
  • 5 medium bowls
  • 5 pastry bags
  • pastry brush


  1. Bake the cake according to box instructions, adding 1 teaspoon "European Style" Madagascar Bourbon Vanilla to each box mix. Let cool completely before assembling.
  2. Meanwhile, prepare the frosting.
  3. Mix 2 teaspoons "European Style" Madagascar Bourbon Vanilla into 7 cups of buttercream.
  4. Separate into 5 separate bowls and add color to each bowl, beginning with one drop and gradually adding more until you reach the desired hue. For pastels, you will probably need 3-4 drops of each color.
  5. Place each color of buttercream into a piping bag and cut the same amount from the tip of each bag. Set aside.
  6. Add the water and ¼ teaspoon "European Style" Madagascar Bourbon Vanilla to the simple syrup and stir to combine. Adding a bit of water to the simple syrup will ensure that it soaks into the cake and not stay on top.
  7. Lightly soak the bottom cake layer.
  8. Beginning on the outside, pipe the pink buttercream around the outer edge, then yellow, green, blue, and finish with purple in the center.
  9. Repeat the process for each layer, soaking each layer with the Vanilla simple syrup before adding the buttercream.
  10. Chill the cake for 30 minutes.
  11. Add remaining 1½ teaspoons "European Style" Madagascar Bourbon Vanilla to the remaining 4 cups buttercream for frosting the outside of the cake.
  12. Crumb coat the cake in white buttercream and chill for 30 minutes.
  13. Final coat the cake in buttercream and chill for 30 minutes.
  14. Press a layer of gold confetti quins around the bottom of the cake.
  15. Wet your finger with just a bit of water and press individual confetti around the remaining area of cake, using less as you go up.
Amoretti Surprise Rainbow Cake Recipe Amoretti Surprise Rainbow Cake Recipe

Products used in this recipe


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