Confetti Birthday Drip Cake

Total Time

Prep: 1-1/2 hours Bake: 35 min. + cooling


20 servings

Updated: Sep. 13, 2023
This is a moist and fluffy vanilla drip cake with lots of sprinkles and a whipped vanilla buttercream. It's almost impossible not to feel happy when you see the fun pop of rainbow confetti! —Courtney Rich, Highland, Utah
Confetti Birthday Drip Cake Recipe photo by Blogger


  • 1 cup unsalted butter, room temperature
  • 1/3 cup vegetable oil
  • 1-3/4 cups sugar
  • 3 large eggs, room temperature
  • 3 large egg whites, room temperature
  • 1 tablespoon vanilla extract
  • 3 cups cake flour
  • 2 teaspoons baking powder
  • 1 teaspoon salt
  • 1 cup buttermilk, room temperature
  • 1/4 cup rainbow sprinkles
  • 2 cups unsalted butter, softened
  • 6 cups confectioners' sugar, sifted
  • 4 tablespoons heavy whipping cream
  • 1-1/2 teaspoons clear vanilla extract
  • DRIP:
  • 1/4 cup heavy whipping cream
  • 1 cup white baking chips
  • Soft blue paste food coloring


  1. Preheat oven to 350°. Line bottoms of 4 greased 6-in. round baking pans with parchment; grease paper. In a large bowl, cream butter, oil and sugar until light and fluffy, 5-7 minutes. Add eggs, then egg whites, 1 at a time, beating well after each addition. Beat in vanilla. In another bowl, whisk flour, baking powder and salt; add to creamed mixture alternately with buttermilk, beating well after each addition. Fold in sprinkles.
  2. Transfer to prepared pans. Bake until a toothpick inserted in center comes out clean, 15-20 minutes. Cool in pans 10 minutes before removing to wire racks to cool completely.
  3. For buttercream, in a large bowl, beat butter until creamy. Gradually beat in confectioners’ sugar until smooth. Add cream and vanilla. Beat until light and fluffy, 3-4 minutes.
  4. For drip, in a microwave, heat cream just to a boil. Pour over baking chips; stir with a whisk until smooth. Tint as desired with food coloring. Cool slightly, stirring occasionally.
  5. To assemble cake, place 1 cake layer on a serving plate; spread with ½ cup frosting. Repeat layers. Top with remaining cake layer. Frost top and sides of cake with ½ cup frosting. Freeze until set, about 10 minutes. Frost top and sides with 1 cup frosting. Pour drip over top of cake, allowing some to flow over sides. Pipe remaining frosting around top edges; top with additional sprinkles. Gently press additional sprinkles into frosting on sides of cake.
Drip Cake Tips

How long should you cool the ganache before pouring it on the cake?

Learning how to make ganache is something all cake bakers should master, but it isn't difficult. For this drip cake, the ganache should cool slightly but still be warm. Too hot, and it’ll melt your buttercream; too cold, and it will start to reach spreading instead of pouring consistency. Let the ganache cool at room temperature for 5 to 10 minutes until the mixture thickens slightly; it should be around 85° to 90°F. You can test its consistency by dripping it down the side of an upside-down drinking glass. If it’s too stiff, you can heat it up again. If you need to add more cream to create a looser consistency, be sure to add hot cream; cold cream will make the ganache seize up and get clumpy instead of liquify.

Do you have to chill the cake before pouring the ganache?

Cold cake is always easier to decorate, and between making layers in advance, applying a crumb coat, and preparing for the final decorations, your cake will be in and out of the fridge or freezer multiple times. Always chill your cake before pouring the ganache over it—the icing should be chilled and firm to the touch. The cold icing will stop the warm ganache from running all the way to the bottom of the cake; it will halt it in its tracks about halfway down the cake.

How can you get thinner or thicker drips on a drip cake?

The easiest way to apply drips to a cake is with a squeeze-top bottle. You can choose bottles with wider or more narrow tips to create different-size drips. You can also use a spoon to apply the ganache and push it over the side; this will give you control if you want to create a wider flow of ganache.

What else can you do with ganache?

Hungry for more decadent cakes laden with rich ganache? Try our vanilla bean cake with white chocolate ganache, three-layer chocolate ganache cake or special-occasion chocolate cake.

Hazel Wheaton, Taste of Home Book Editor

Nutrition Facts

1 slice: 658 calories, 38g fat (21g saturated fat), 110mg cholesterol, 223mg sodium, 77g carbohydrate (60g sugars, 0 fiber), 5g protein.