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    Home » Recipes » Desserts

    Naked Pastel Rainbow Cake

    Published: May 12, 2022 · Modified: Jun 20, 2022 by Karin and Ken · This post may contain affiliate links. Leave a Comment

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    This naked pastel rainbow cake recipe is the best way to celebrate spring and summer ever! Tender, moist cake is layered with just the right amount of sweet, buttercream frosting.

    Slice of pastel rainbow cake on plate with more cake in background

    Nake cakes are one of my favorite desserts. I love cake, but I'm not a fan of so much frosting that you lose the flavor of the cake. With naked cakes like this one, you get the perfect amount of cake and frosting in every bite.

    Pastel Rainbow Cake Recipe

    This was inspired by my other naked cake recipe on this site and makes a great dessert after this amazing chicken thigh recipe.

    Ingredients

    You only need a few basic ingredients to make both the cake and the frosting. You'll find them all easily at your local grocery store.

    For the Cake

    • Softened butter
    • Sugar
    • Vanilla extract
    • Egg whites
    • All-purpose flour
    • Baking powder
    • Salt
    • Milk
    • Red, orange, yellow, green, and blue food coloring

    For the Frosting

    • Softened butter
    • Powdered sugar
    • Vanilla
    • Milk
    • Sprinkles of your choice

    See the recipe card at the end of the post for quantities.

    How to Make a Pastel Rainbow Cake

    As layered cakes go, this one is incredibly easy to make. It's a very simple recipe when you break it down into steps. Even beginners can make this one.

    Step 1: Prep

    Preheat the oven to 350 degrees. Then, coat five 8-inch round baking pans with a thin layer of nonstick spray and thin layer of flour.

    Step 2: Combine the Wet Cake Ingredients

    Cream the butter and sugar together in a large mixing bowl. Then, add the vanilla and egg whites and beat again until smooth.

    Step 2: Add the Remaining Ingredients

    Add the flour, baking powder, salt, and milk and beat until the batter is smooth.

    Step 3: Separate and Color the Batter

    Divide the batter evenly into 5 bowls. Then, add different food coloring to each bowl respectively until you have 5 differently colored batters. Stir well until the color is uniform in each bowl.

    Step 4: Bake

    Transfer each colored batter to a baking pan. Bake the cakes until a toothpick inserted into the center of the cake comes out clean.

    Step 5: Cool

    When the cakes are done, let them cool in their pans for 15 minutes. Then, flip them out onto wire cooling racks to cool completely. You may need to use a knife to release the edges.

    Step 6: Make the Frosting

    Cream the butter and powdered sugar together in a medium mixing bowl. Then, add 2 tablespoons of milk and vanilla and beat well. Adjust the frosting using milk and powdered sugar if the frosting is too thick or thin respectively.

    Step 7: Assemble the Cake

    Place the blue layer of cake on a serving plate, then frost it with buttercream. Repeat this process with the green, yellow, orange, and red layers. Finally, top the frosting red layer with sprinkles.

    Hint: Be sure you thoroughly cover the inside of your cake pans with spray and flour. Any spot that isn't covered can cause your cake to break apart when you try to flip it out.

    Closeup shot of naked pastel rainbow cake with slice cut out

    Substitutions

    Don't have the correct ingredients on hand or want to change something up? Here are some helpful tips for you to change this pastel rainbow cake recipe.

    • Cake Flour - For an even more tender cake, try using cake flour.
    • Heavy Cream - You can use heavy cream in place of milk for this recipe.

    Variations

    Want to personalize this naked pastel rainbow cake recipe? Here are some of my tried and true tips for changing up this recipe.

    • Your Favorite Cake - Make your favorite cake flavor for this recipe.
    • Any Colors - You can adjust the colors for this cake to make it work for almost any holiday.

    If you love recipes like this, you may also enjoy this rainbow cake roll.

    Equipment

    You'll only need some basic kitchen equipment to make this recipe.

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

    Storage

    You can store this cake in an air-tight container in the refrigerator for up to a week. For longer storage, you can freeze this cake for up to 6 months.

    Tips

    This cake is quite easy to make, but I do have some tips here that will make it even better and easier for you.

    • A hand mixer is your friend for this recipe. It makes things so much easier.
    • Be sure your cake pans are thoroughly coated with nonstick spray and flour to prevent sticking.
    • Be sure you let your cake cool completely. Even a slightly warm cake will not frost correctly.
    Slice of naked pastel rainbow cake on plate

    More Cake Recipes

    Do you like cake? Here are some recipes you may also like to try.

    • Lemon Raspberry Loaf Cake
    • Air Fryer Lava Cake
    • Orange Bundt Cake

    FAQ

    Do you have questions about naked pastel rainbow cake? Here are some of the most commonly asked questions about this rainbow pastel cake recipe.

    Who invented naked cake?

    Christina Tosi, owner of Milk Bar is credited with first making naked cakes around 2014.

    How long is buttercream cake good?

    It will last for about a week in the refrigerator or up to 6 months in the freezer.

    How do I freeze buttercream cake?

    Place the cake on a plat with parchment paper and open-air freeze it for about 4 hours. Then, tightly wrap it in a double layer of cling wrap and then a layer of foil.

    How do I defrost a frozen cake?

    Place it in the refrigerator overnight.

    Naked Pastel Rainbow Cake Video

    Ready to get cooking? Remember that you can print this recipe if you would like.

    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!
    Print Recipe Pin Recipe
    Prep Time 20 mins
    Cook Time 15 mins
    Additional Time 30 mins
    Total Time 1 hr 5 mins
    Course Dessert
    Cuisine American
    Servings 12
    Calories 442 kcal

    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.

    Nutrition

    Calories: 442kcalCarbohydrates: 100gProtein: 7gFat: 2gSaturated Fat: 1gPolyunsaturated Fat: 0.2gMonounsaturated Fat: 0.4gCholesterol: 6mgSodium: 405mgPotassium: 138mgFiber: 1gSugar: 75gVitamin A: 86IUCalcium: 148mgIron: 2mg
    Keyword naked rainbow cake, pastel rainbow cake
    Tried this recipe?Let us know how it was!
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    Welcome!

    Ken and Karin

    We are the kitchen divas: Karin and my partner in life Ken.

    We have been attached at the heart and hip since the first day we met, and we love to create new dishes to keep things interesting. Variety is definitely the spice of life!

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