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Naked Pastel Rainbow Cake

This nake pastel rainbow cake recipe features the perfect amount of cake and frosting in every bite. It's as tasty as it is pretty!
Course Dessert
Cuisine American
Keyword naked rainbow cake, pastel rainbow cake
Prep Time 20 minutes
Cook Time 15 minutes
Additional Time 30 minutes
Total Time 1 hour 5 minutes
Servings 12

Equipment

  • Measuring cups and spoons
  • Mixing Bowls
  • Whisk or hand mixer (preferred)
  • Cake pans
  • Frosting knife or spatula
  • Wire racks

Ingredients

Cake Ingredients

  • 1 cup butter softened
  • 2 cups sugar
  • 2 teaspoons vanilla extract
  • 6 large egg whites
  • 3 cups all-purpose flour
  • 4 teaspoons baking powder
  • 1 teaspoon salt
  • 1 cup milk
  • food coloring red, orange, yellow, green, and blue
  • cooking spray

Frosting Ingredients

  • ½ cup butter softened
  • 4 cups powdered sugar
  • 1 teaspoon vanilla
  • 2-3 tablespoon milk
  • Sprinkles of your choice

Instructions

  • Get out and measure your ingredients.
    Overhead photo of all the ingredients needed to make a Naked Pastel Rainbow Cake.

Cake Directions

  • Preheat oven to 350ºF.
  • In a large mixing bowl, cream butter and sugar together.
    Cream butter and sugar placed in a large mixing bowl. Mix together.
  • Add vanilla and egg whites. Beat again until smooth.
    Vanilla and egg whites added to the butter and sugar mixture in the large mixing bowl. Mix together.
  • Add flour, baking powder and salt.
    Added flour, baking powder and salt to the large mixing bowl. Mix together.
  • Add milk. Beat again until batter is smooth.
    Adding milk to the batter in the large mixing bowl.
  • Separate batter into 5 separate bowls. Add one of the five food coloring colors to each bowl. The amount you add will depend on the type of food coloring you are using. Stir well until colors are even.
    Batter separated into 5 bowls. Each batter is colored using food coloring. No two bowls share the same color.
  • Prepare 8-inch round baking pans by coating them with cooking spray and a thin layer of flour. Tap pan to remove excess flour.
  • Transfer each color of batter to a prepared baking pan.
    Baking pans coated in cooking spray and flour. Batter transferred from bowls to prepared baking pans.
  • Cook each colored layer for 15 minutes
    Cooked colored layers of naked pastel rainbow cake in baking pans.
  • or until a toothpick inserted in the center comes out clean.
    Uncooked cake batter in baking pans. One batter is green while the other is blue.
  • When done baking, allow them to cool for 15 minutes before flipping them out of the pans on to a rack. You may need to use a knife to release the edges. Allow them to cool completely before frosting them.

Frosting Directions

  • In a medium mixing bowl, cream butter and powdered sugar together.
    Cream butter and powdered sugar placed in a medium mixing bowl. Mix together.
  • Add 2 tablespoons of milk and vanilla. Beat well.
(If it is too thick, add more milk. If it is too thin, add more powdered sugar.)
    Milk and vanilla added to the medium mixing bowl. Mix well.
  • Until just right.
    Prepared icing for naked pastel rainbow cake in a medium mixing bowl.

Assembly Directions

  • Place the blue layer of cake on your serving plate.
    Blue cake layer placed on a large round plate.
  • Cover it with a layer of frosting. You will need to spread five layers of frosting, so be sure to use only enough to cover the surface of each layer.
    Layer of naked pastel rainbow cake covered in frosting.
  • Continue this with the green, yellow, orange, and red layers. Add sprinkles of your choice to the top.
    Prepared naked pastel rainbow cake. The cake has 5 layers resembling a rainbow. Frosting is placed between each layer. The top of the cake is sprinkled with rainbow-colored sprinkles.
  • Slice.
    Prepared naked pastel rainbow cake. The cake has 5 layers resembling a rainbow. Frosting is placed between each layer. The top of the cake is sprinkled with rainbow-colored sprinkles. A large slice is missing from the cake.
  • Serve.
    A large slice of naked pastel rainbow cake standing upright on a small white plate.
  • Enjoy every bite.
    Closeup photo of a fork holding a bite of naked pastel rainbow cake. The entire cake in the background.