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Cookie Monster Cake

This Cookie Monster Cake is a delightful dessert featuring moist chocolate chip cake layers, a rich cookie dough frosting, and vibrant blue vanilla buttercream. Perfect for birthdays and special occasions, it's a treat that both kids and adults will love.
Print Recipe
Prep Time 45 minutes
Cook Time 25 minutes
Total Time 1 hour 10 minutes
Course Dessert
Cuisine American
Servings 12 servings
Calories 750 kcal

Equipment

  • Three 9-inch round cake pans
  • Mixing bowls
  • Electric mixer (stand or handheld)
  • Measuring cups and spoons
  • Rubber spatula
  • Offset spatula
  • Cooling racks
  • Cake turntable (optional)
  • Piping bags and tips (optional for decoration)

Ingredients
  

For the Chocolate Chip Cake:

  • 2 and 1/2 cups 313g all-purpose flour
  • 2 and 1/2 teaspoons baking powder
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon salt
  • 3/4 cup 170g unsalted butter, softened to room temperature
  • 1 and 3/4 cups 350g granulated sugar
  • 1/2 cup 120g sour cream, at room temperature
  • 1 tablespoon pure vanilla extract
  • 6 large egg whites at room temperature
  • 1 cup 240ml whole milk, at room temperature
  • 1 and 1/4 cups 225g mini semi-sweet chocolate chips

For the Cookie Dough Frosting

  • 1 cup 226g unsalted butter, softened to room temperature
  • 1 cup 200g light brown sugar
  • 2 and 1/2 cups 300g confectioners’ sugar
  • 1/2 cup 120ml heavy cream
  • 1/4 teaspoon salt
  • 1 and 1/2 teaspoons pure vanilla extract
  • 1 and 1/4 cups 225g mini semi-sweet chocolate chips

For the Blue Vanilla Buttercream

  • 1 cup 226g unsalted butter, softened to room temperature
  • 4 and 1/2 cups 540g confectioners’ sugar
  • 1/4 cup 60ml heavy cream
  • 2 teaspoons pure vanilla extract
  • 1/8 teaspoon salt
  • Blue gel food coloring

For Decoration

  • Chocolate chip cookies
  • Candy eyes

Instructions
 

Preheat the Oven

  • Preheat to 350°F (177°C). Grease and flour three 9-inch round cake pans.

Mix the Dry Ingredients

  • In a medium bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.

Cream Butter & Sugar

  • In a large mixing bowl, beat the softened butter and granulated sugar together using a mixer on high speed until smooth and creamy (about 2–3 minutes).

Add the Wet Ingredients

  • Mix in the sour cream and vanilla extract until combined.
  • Add the egg whites one at a time, beating well after each addition until the mixture is light and fluffy.

Combine Wet & Dry with Milk

  • Add ⅓ of the flour mixture to the wet ingredients and mix on low just until combined.
  • Then add ½ of the milk, mixing again.
  • Repeat with another ⅓ of the flour mixture, then the rest of the milk.
  • Finish by adding the final ⅓ of the flour mixture and mixing until just incorporated.
  • Do not overmix.
  • Gently fold in the mini chocolate chips with a spatula.

Bake the Cake

  • Divide the batter evenly between the prepared cake pans.
  • Bake for 25–26 minutes, or until a toothpick inserted into the center comes out clean.
  • Allow the cakes to cool completely in the pans set on a wire rack.

Level the Cakes

  • Once cooled, use a serrated knife to trim any domed tops. Save these scraps to make Cookie Monster's eyes later.

Make the Frostings

  • Prepare both the cookie dough frosting (for layering) and the blue vanilla buttercream (for coating).
  • Use blue gel food coloring to tint the buttercream until you get a vibrant Cookie Monster blue.

Assemble the Cake

  • Place the first cake layer on a plate or cake stand. Spread a layer of cookie dough frosting on top.
  • Add the second cake layer and repeat. Top with the final cake layer.
  • Apply a thin layer of blue buttercream around the sides and top (a crumb coat).
  • Chill the cake in the fridge for at least 30 minutes.

Make Cookie Monster’s Eyes

  • Mix the cake scraps with a small amount of frosting and form 2 round eye shapes.
  • Freeze until firm, then dip in melted white chocolate. Let them set, then add small dots of black frosting or melted chocolate for pupils.

Decorate the Cake

  • Using a piping bag fitted with a grass tip, cover the cake with the blue vanilla buttercream to create Cookie Monster's “fur.”
  • Place the eyes on top, slightly askew.
  • Stick a chocolate chip cookie into the “mouth” and decorate around the base with additional cookies.

Notes

  • Ensure all ingredients are at room temperature for best results.
  • Use gel food coloring to achieve a vibrant blue hue without altering the frosting's consistency.
  • Decorate the cake just before serving to maintain the freshness of the cookies.
Keyword Cookie Monster Cake, chocolate chip cake, cookie dough frosting