Funfetti Cake

Funfetti Cake by wood and Spoon blog. This is a sprinkle birthday cake that tastes like the boxed cake mix! Features a clear vanilla extract American buttercream made with cream cheese and loaded of colorful rainbow sprinkles. Learn how to make this cake at home with real ingredients for celebrations and kids birthdays on

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This funfetti cake is loaded with rainbow sprinkles and box cake mix flavor. It’s a made from scratch celebration cake!


For the cake:

  • 1 cup unsalted butter, at room temperature
  • ½ cup vegetable or canola oil
  • 13/4 cup sugar
  • 5 eggs
  • 1 tablespoon clear vanilla extract
  • 33/4 cups cake flour
  • 1 teaspoon salt
  • ¾ teaspoon baking powder
  • ¾ teaspoon baking soda
  • 11/2 cups buttermilk, at room temperature
  • ¾ cup rainbow jimmies

For the frosting:

  • 11/2 cups unsalted butter, at room temperature
  • 6 ounces cream cheese, at room temperature
  • 1 tablespoon clear vanilla extract
  • ½ teaspoon salt
  • 6 cups powdered sugar, plus more as needed
  • 12 tablespoons milk, as needed


To prepare the cake:

  1. Preheat the oven to 350 degrees and prepare 3-8” pans by spraying them with baking spray and lining the bottoms with parchment paper rounds. In the bowl of a stand mixer, cream the butter, oil and sugar on medium speed for 4 minutes. Scrape the sides of the bowl and add the vanilla and eggs one at a time, stirring briefly after each addition. In a separate bowl, combine the cake flour, salt, baking powder, and baking soda. Add half of the dry ingredients, mixing on low speed, followed by the buttermilk. Add the remaining dry ingredients and jimmies and stir to combine. Divide the batter evenly between the three pans and bake in the preheated oven for about 30 minutes, or until a toothpick inserted comes out clean.

    To prepare the frosting:

  2. Cream the butter in the bowl of a stand mixer on medium speed until light and fluffy, about 6 minutes. Add the cream cheese and beat on medium speed just to combine, about 1 minutes. Stir in the clear extract and salt, Add about half of the powdered sugar and stir on low to combine. Add the remaining powdered sugar and scrape the sides of the bowl prior to combining. Once uniform, check the consistency. Add a tablespoon or two of milk to thin out the frosting or ¼ cup or so of powdered sugar to thicken it up. The mixture should be a smooth, soft consistency. Set aside while you get ready to prepare your cake.

To assemble the cake:

  1. Use a serrated knife to trim the domes off your cakes. I like to briefly freeze my cakes in plastic wrap to make assembly easier. You can do this is you’d like. Otherwise, spread a little frosting on the bottom of an 8” cake board and place the first layer on top. Place a big dollop of frosting on top and use an offset spatula to smooth it on. Repeat this process while stacking the remaining two layers of cake. Use your offset spatula to smooth on a thin layer all over the cake. You can place your cake in the fridge briefly to allow the frosting to firm up. Continue decorating the cake as desired and enjoy! Serve at room temperature.