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+ servings
A slice of cookie cake on a plate

Funfetti Cookie Cake

Author: Gail Ng
Celebrate birthdays or special occasions with a soft & chewy funfetti cookie cake with vanilla buttercream frosting and rainbow sprinkles
5 from 1 vote
Prep Time 30 mins
Cook Time 25 mins
Total Time 55 mins
Yield 1 8" cake
Category Desserts
Cuisine American


Cookie Cake

  • 115 g unsalted butter, softened
  • 50 g brown sugar
  • 150 g granulated sugar
  • 2 large eggs
  • 2 teaspoon vanilla extract
  • 200 g all-purpose flour
  • ½ teaspoon baking soda
  • ½ teaspoon baking powder
  • ½ teaspoon salt
  • 3 tablespoons rainbow sprinkles

Vanilla Buttercream Frosting

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


Cookie Cake

  • Preheat oven to 350°F and line the bottom of a 8" cake pan with a circle of parchment paper.
  • 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.
  • 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.
  • Add in the rainbow sprinkles and fold until just incorporated.
  • 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 350°F for 23-25 minutes or until the top has set and edges are golden brown.
  • Let cool for at least 10 minutes before removing from pan. The middle will sink as it cools.

Vanilla Buttercream Frosting

  • In a mixing bowl, beat softened butter with a hand mixer or stand mixer for about 5 minutes until light, fluffy, and creamy.
  • 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.
  • Pipe buttercream on top of the cake and write a message with melted chocolate, if desired. 


Calories: 3642kcal | Carbohydrates: 481g | Protein: 38g | Fat: 176g | Saturated Fat: 107g | Polyunsaturated Fat: 9g | Monounsaturated Fat: 47g | Trans Fat: 6g | Cholesterol: 707mg | Sodium: 2105mg | Potassium: 844mg | Fiber: 11g | Sugar: 314g | Vitamin A: 4892IU | Calcium: 338mg | Iron: 18mg
Keywords birthday cookie cake, birthday desserts, confetti cookie cake, funfetti cookie cake
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