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Rainbow Sprinkle Cake
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4.50 from 10 votes

Rainbow Sprinkle Cake

It's always a celebration when the Rainbow Sprinkle Cake comes to the party!  This layered vanilla cake is light, fluffy, and melt-in-your-mouth yummy with lots of fun, vibrant multi-colored sprinkles, paired with the best vanilla frosting with even MORE sprinkles on top! No celebration is complete without a funfetti layer cake!
Prep Time15 minutes
Cook Time30 minutes
Course: Dessert
Keyword: birthday cake, cake, party dessert, sprinkles, vanilla cake, vanilla frosting
Servings: 10 Servings
Calories:
Author: Kim Lange

Ingredients

Sprinkle Vanilla Cake

  • 2 ½ cups all-purpose flour
  • 2 ½ teaspoons baking powder
  • 1 teaspoon salt
  • 1 cup unsalted butter softened
  • 1 ½ cups granulated sugar
  • 4 large eggs room temperature
  • 1 tablespoon vanilla extract
  • 1 cup buttermilk room temperature (can also use milk of choice)
  • cup sprinkles add more if desired

Best Vanilla Frosting

  • cups unsalted butter room temperature
  • ½ teaspoon salt
  • 6 cups powdered sugar
  • ¼ cup cream or milk plus more as needed
  • 2 teaspoons vanilla add more to taste if desired
  • Optional: ½ teaspoon butter extract
  • sprinkles, add if frosting middle layer and wherever you would like!

Instructions

  • Preheat the oven to 350°F and prepare two 9“ or 2 deep 8" cake pans by lining the bottoms with parchment paper and lightly greasing the sides. Set aside.

Sprinkle Vanilla Cake

  • In a medium bowl, whisk together flour, baking powder, and salt. Set aside.
  • Using mixer, beat butter and sugar on medium-high speed 5 minutes until thick and fluffy, scraping down the bowl as needed.
  • Add eggs one at a time, beating well with each addition. Add vanilla and mix in to combine.
  • Reduce mixer speed to medium and add the flour mixture in thirds alternating with the buttermilk, mixing to incorporate with each addition and beat until just combined and smooth.
  • Add in sprinkles and mix in to combine.
  • Evenly divide batter into your prepared cake pans, and bake on 350F (175C) for 30-35 minutes. When the cake is done, the surface should spring back to the touch and a toothpick inserted in the center should come out mostly clean with few moist crumbs (no wet batter).
  • Allow cakes to cool in their cake pans for 10-15 minutes before inverting onto cooling rack to cool completely before frosting.

Best Vanilla Frosting

  • Using mixer, cream the butter.
  • Add the sugar a few cups at a time and mix on low.
  • Add in the cream and vanilla and mix together. Add in the remaining powdered sugar and beat on low, then increasing to medium to high speed for about 2-3 minutes.
  • Reduce the speed to low and mix an additional minute. Add in more powdered sugar if too thin or add more cream if too thick to get texture desired for frosting.

How to Assemble Layered Cake

  • Once cakes have cooled, go ahead and frost or place cakes in fridge tightly wrapped in saran wrap until you are ready to frost. If it’s more than a couple of days, you may be better off placing them in the freezer.
  • Place one of cake layers on the pedestal or cake plate.
  • Take 1 ½ cups of the vanilla frosting and add a few tablespoons of sprinkles and mix it in.
  • Frost the cake layer with the sprinkle vanilla frosting you just made, by first piping a dam ½” around the border, then continue filling in the middle with the rest of your sprinkle vanilla frosting.
  • Add the next layer of cake on top.
  • Frost cake with remainder of the vanilla frosting, (reserving some to the side if you want to add borders) and then add more sprinkles wherever you want for some pop of color!

Notes

  • I piped a shell border around the top and bottom of my cake. Then I made some white chocolate hearts by melting white chocolate and piping heart shapes and added sprinkles. Once them were set up, I placed them in the middle of my cake for a simple and cute decorative!
  • You can also make your own buttermilk at a ratio of 1 cup whole milk to 1 tablespoon fresh lemon juice. Combine and let it sit 10 minutes to curdle then stir and use.