Go Back
Funfetti Cake

Funfetti Cake

This Funfetti Cake starts with a box cake mix and gets doctored up to make it a soft and moist cake. It's full of sprinkles making it the perfect treat for any kind of celebration!
Prep Time 45 mins
Cook Time 25 mins
Cool Time 1 hr 30 mins
Total Time 2 hrs 40 mins
Course Dessert
Servings 24 slices


Cake Layers

  • 1 15.25 oz pkg cake mix (white or Funfetti)*
  • 1 c flour
  • 1 c sugar
  • 1 c sour cream
  • 1/2 c butter melted and cooled
  • 1 c milk
  • 3 eggs
  • 1 tsp almond extract (or vanilla if you prefer)
  • 3 tbsp sprinkles** if using a white cake

Buttercream Frosting

  • 1 1/2 c salted butter set out at room temperature for 30 minutes (slightly softened)
  • 6 c powdered sugar
  • 1 tsp vanilla extract
  • 2-4 tbsp milk or heavy cream
  • sprinkles for decorating


  • Preheat oven to 325°F and line 3 round cake pans (8 or 9") with parchment paper rounds. Spray the edges of the pan with cooking spray.
  • In the bowl of a stand mixer, add the cake mix, flour and sugar and mix.
  • Add the sour cream, butter, milk, eggs, extract and sprinkles. Beat for 1 minute, scrapping the sides down half-way through.
  • Divide the batter evenly between the three prepared pans (about 2 cups of batter each).***
  • Bake for 20-25 minutes or until a toothpick poked into the middle of the cake comes out clean.
  • Let the cakes cool for a few minutes, then go around the edges with a butter knife to help release the cake. Then, flip the pans over to release the cake onto a cooling rack. Remove the parchment paper and let cool completely.
  • When the cakes are cool, it's time to make the buttercream and assemble. To make the buttercream, place the butter in the bowl of a stand mixer and beat until smooth.
  • Add powdered sugar, vanilla and 1 tbsp milk and mix slowly until combined.
  • Add additional milk if needed, mixing well between each addition.
  • Place one cake layer on the bottom of a platter. Spread frosting over the cake in a smooth, even layer.
  • Repeat until you have all three layers stacked.
  • Frost the edges and top of the cake, making a thin layer of frosting called the crumb coat (don't worry if there are some crumbs in there - it'll be covered later). Place in the freezer for 30 minutes.
  • Once the crumb coat is firm, you'll put the final coat of buttercream on!
  • Top with sprinkles, slice and enjoy!


*JUST the cake mix, not all the extra ingredients on the back of the box.
**What type of sprinkles?  Quins (the flat round sprinkles) or jimmies will work best.  Sanding sugar and non-pareils won't work as well as the colors will "melt" into the batter.
***Cake Pans - See notes above in the blog post about different options if you don't have three round cake pans.
Keyword funfetti, layer cake