A slice of cookie cake on a plate

Funfetti Cookie Cake

  • Author: Gail Ng
  • Prep Time: 30 minutes
  • Cook Time: 25 minutes
  • Total Time: 55 minutes
  • Yield: One 8" cake 1x
  • Category: Desserts
  • Method: Baking
  • Cuisine: American


Celebrate birthdays or special occasions with a soft & chewy funfetti cookie cake with vanilla buttercream frosting and rainbow sprinkles



Cookie Cake

  • 115g unsalted butter, softened
  • 50g brown sugar
  • 150g granulated sugar
  • 2 large eggs
  • 2 teaspoon vanilla extract
  • 200g all-purpose flour
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon baking powder
  • 1/2 teaspoon salt
  • 3 tablespoons (40g) rainbow sprinkles

Vanilla Buttercream Frosting

  • 60g unsalted butter, softened
  • 75g powdered sugar
  • 1 teaspoon vanilla extract
  • 1 tablespoon milk
  • 50g dark chocolate, if desired for piping a message


Cookie Cake

  1. Preheat oven to 350F and line the bottom of a 8″ cake pan with a circle of parchment paper.
  2. In a large bowl, beat butter with a hand mixer or stand mixer until it becomes smooth and creamy. Mix in brown sugar and granulated sugar until well combined. Add eggs and vanilla extract and mix until creamy.
  3. In a medium bowl, stir together flour, baking soda, baking powder, and salt. Add this dry mixture to the wet mixture and fold together with a spatula until almost combined.
  4. Add in the rainbow sprinkles and fold until just incorporated.
  5. Smooth the batter into your lined cake pan. Don’t worry about getting all the way to the edges as it will fill the pan as it bakes. Bake at 350F for 23-25 minutes or until the top has set and edges are golden brown.
  6. Let cool for at least 10 minutes before removing from pan. The middle will sink as it cools.

Vanilla Buttercream Frosting

  1. In a mixing bowl, beat softened butter with a hand mixer or stand mixer for about 5 minutes until light, fluffy, and creamy.
  2. With the mixer on low, add in the powdered sugar and vanilla extract. Add in milk as needed, one tablespoon at a time, until the buttercream becomes smooth, creamy, and pipeable.
  3. Pipe buttercream on top of the cake and write a message with melted chocolate, if desired. 

Keywords: funfetti cookie cake, confetti cookie cake, birthday cookie cake, birthday desserts