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How to make a rainbow cake?

Updated on July 12, 2013
Rainbow Cake
Rainbow Cake | Source


  • Vegetable Shortening
  • 3 cups All-Purpose Flour
  • 2 1/3 cups sugar
  • 4 teaspoon baking powder
  • 5 large egg whites
  • 1/2 teaspoon salt
  • 2 teaspoon pure vanilla
  • 2 sticks unsalted butter
  • 1 1/2 cups milk
  • food coloring, any color(rainbow colors referred)
  • lemony swiss meringue buttercream
  1. Preheat oven to 350 degrees. Brush six 9-inch-round cake pans (or as many 9-inch cake pans as you have, reusing them as necessary) with shortening. Line bottom of each cake pan with parchment paper; brush again and set aside.
  2. In a large bowl, whisk together flour, baking powder and salt; set aside. In the bowl of an electric mixer fitted with the paddle attachment, cream together butter and sugar. Slowly add egg whites and mix until well combined. Add vanilla and mix until fully incorporated. Add flour mixture and milk in two alternating additions, beginning with the flour and ending with the milk. Mix until well combined.
  3. Divide batter evenly between six medium bowls. Add enough of each color of food coloring to each bowl, whisking, until desired shade is reached. Transfer each color to an individual cake pan. Transfer to oven and bake until a cake tester inserted into the center of each cake comes out clean, about 15 minutes
  4. Remove cakes from oven and transfer to a wire rack; let cool for 10 minutes. Invert cakes onto a wire rack; re-invert and let cool completely.
  5. Using a serrated knife, trim tops of cakes to make level. Place four strips of parchment paper around perimeter of a serving plate or lazy Susan. Place the purple layer on the cake plate. Spread a scant 1 cup buttercream filling over the first layer with a small offset spatula so it extends just beyond edges. Repeat process with blue, green, yellow, and orange layers.
  6. Place the remaining red layer on top, bottom-side up. Gently sweep away any loose crumbs with a pastry brush. Using an offset spatula, cover the top and sides with a thin layer of frosting (also use any of the excess frosting visible between the layers). Refrigerate until set, about 30 minutes.
  7. Using an offset spatula, cover cake again with remaining frosting.
  8. yay! there you have it a colorful rainbow cake! enjoy!


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    • Ceres Schwarz profile image

      Ceres Schwarz 4 years ago

      This rainbow cake looks really good. The image of the cake looks colorful and delicious. Now I want to have some. The recipe doesn't seem all that hard to make at all.

    • peachpurple profile image

      peachy 4 years ago from Home Sweet Home

      Yeah, it really is colorful and looks yummy. As if i could take a bite in this hub. Thanks for sharing the recipe. Voted up

    • Vacation Trip profile image

      Susan 4 years ago from India

      Wow. This Rainbow cake looks very delicious. Thank you for sharing. Voted up.