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+ servings
rainbow swirl cake

Rainbow Swirl Cake

Jacklin Altman
This cake screams fun, with mesmerizing rainbow swirls and an incredible vanilla almond buttercream. It's way easier than it looks, and it's sure to impress at your next event.
5 from 2 votes
Prep Time 25 mins
Cook Time 35 mins
Decorating Time 25 mins
Total Time 1 hr 25 mins
Course Dessert
Cuisine American
Servings 12
Calories 521 kcal

Equipment

  • Mixing Bowls
  • 8" Cake Pans
  • Oven
  • Stand Mixer
  • Cake Turntable

Ingredients
  

Cake
  • 2 1/4 cups all-purpose flour
  • 1 cup sugar
  • 2 tsp baking powder
  • 1/2 tsp salt
  • 1/2 cup unsalted butter softened to room temperature
  • 1 tsp vanilla extract
  • 1 cup milk can substitute plant milk
  • 2 large eggs
  • Gel food coloring various colors
Vanilla Almond Buttercream
  • 1 cup Unsalted butter softened to room temperature
  • 3.5 cups Powdered sugar
  • 1 tbsp Milk or heavy cream
  • 1 tsp Vanilla extract
  • 2 tsp Almond extract
  • 1/2 tsp Salt

Instructions
 

To make the cake
  • Preheat oven to 350F
  • Beat together butter and sugar until creamed together, then add egg and milk and beat to combine
  • In a separate bowl, combine flour, salt, and baking soda and pour into the wet ingredients, stirring to combine
  • Divide batter into 2-6 parts (depending on how many colors you want), and dye each part with gel food coloring. Then, create a swirl by pouring one color after another into the center in 2 tbsp increments (see blog post for details).
    rainbow swirl cake
  • Pour into greased cake pans. Bake 25-30 minutes at 350F, until a toothpick comes out clean
  • Allow cake to cool while you work on your frosting.
  • Before frosting, level your cake layers. Optional: cut layers in half to create 4 layers.
    rainbow swirl cake
To make the frosting
  • Add butter into stand mixer and beat on medium-low speed until butter is whipped.
  • Mix in vanilla extract, almond extract, and salt and beat until mixture is smooth, scraping down the sides as needed.
  • Add powdered sugar 1/2 cup at a time, until fully incorporated.
  • Add milk or cream and mix on medium speed to combine.
  • To thicken thin frosting, add powdered sugar. If frosting is too thick, add a more milk or cream 1 tsp at a time.
    vanilla almond buttercream frosting

Nutrition

Calories: 521kcalCarbohydrates: 71gProtein: 4gFat: 25gSaturated Fat: 16gTrans Fat: 1gCholesterol: 92mgSodium: 422mgPotassium: 73mgFiber: 1gSugar: 52gVitamin A: 800IUVitamin C: 1mgCalcium: 78mgIron: 1mg
Keyword Cake, funfetti, buttercream, frosting, almond, vanilla, rainbow
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