Funfetti Layer Cake: Your New Favorite Celebration Cake

👩‍🍳 Instructions

1. 1

   Preheat oven to 350°F (175°C). Grease and flour three 8-inch round cake pans. Line bottoms with parchment paper if desired.
2. 2

   In a large bowl, whisk together the sifted flour, granulated sugar, baking powder, and ½ teaspoon salt.
3. 3

   In a separate large bowl, using an electric mixer, beat 1 cup softened butter on medium speed until creamy, about 2 minutes.
4. 4

   Gradually add the sugar to the butter and beat for 3-4 minutes until light and fluffy.
5. 5

   Reduce mixer speed to low. Gradually add the egg whites, one at a time, mixing well after each. Scrape down bowl sides as needed.
6. 6

   In a small bowl, combine whole milk and 2 teaspoons vanilla extract.
7. 7

   With mixer on low, alternate adding dry ingredients and milk mixture to butter mixture, starting and ending with dry ingredients. Mix until just combined.
8. 8

   Gently fold in the rainbow sprinkles by hand with a spatula until just incorporated, being careful not to overmix.
9. 9

   Divide batter evenly among prepared cake pans. Bake for 25-30 minutes, or until a wooden skewer inserted into the center comes out clean.
10. 10

    Cool cakes in pans for 10-15 minutes, then invert onto a wire rack to cool completely before frosting.
11. 11

    For the buttercream: Gently melt white chocolate and set aside to cool to room temperature.
12. 12

    In a large bowl with an electric mixer, beat 1 ½ cups softened butter on medium speed until creamy and pale, 3-4 minutes.
13. 13

    Gradually add sifted powdered sugar, 1 cup at a time, beating well after each. Mixture will be thick.
14. 14

    Slowly drizzle in cold heavy cream, 1 teaspoon vanilla extract, and ¼ teaspoon salt. Increase speed to medium-high and beat for 3-5 minutes until light and fluffy.
15. 15

    With mixer on low, slowly pour in the cooled melted white chocolate. Beat until just combined and smooth.
16. 16

    To assemble: Place one cake layer on a serving plate. Spread with about ¾ to 1 cup buttercream. Repeat with second layer. Top with third layer.
17. 17

    Apply a thin crumb coat of buttercream over the entire cake. Chill for 15-20 minutes to set.
18. 18

    Apply remaining buttercream, smoothing with an offset spatula. Decorate with extra sprinkles if desired. Serve at room temperature.