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Cookie Monster cake

Cookie Monster Cake

This smash cake size Cookie Monster Birthday Cake is perfect for a Sesame Street Birthday Party.
Prep Time 40 mins
Cook Time 20 mins
Total Time 1 hr
Course Dessert
Cuisine American
Servings 6


  • two 5-or 6-inch round pans
  • disposable pastry bag
  • plastic coupler
  • grass piping tip


  • 1 cake mix, prepared into batter (flavor of choice)
  • 2 batches Easy Vanilla Buttercream (see note, or frosting of choice)
  • bright blue food coloring gel
  • store bought black frosting
  • 1 chocolate chip cookie (small to medium in size, homemade or store bought)


  • Butter and flour two round 5- or 6-inch round pans, or use a baking spray like Pam for Baking.
  • Prepare cake batter according to package directions and pour into the prepared pans until 2/3-full. Use the rest of the batter for cupcakes, such as the Chocolate Chip Cookie Cupcakes. Bake the small cakes according to package directions, reducing baking time to account for their smaller size.
  • Once cakes are baked, cool for 10 minutes, then invert onto a cooling rack to remove from pans. Cool to room temperature.
  • Place 1 cake layer on top of a cake stand or cardboard cake circle. Place strips of waxed paper underneath the bottom edges of the cake to protect the cake stand/circle from frosting during decorating. Frost the top of the cake with buttercream then add the second layer on top and cover completely with buttercream to serve as crumb coat.
  • Use black frosting to pipe a filled half circle for Cookie Monster's mouth.
  • Set aside a small portion of untinted buttercream that you will use to make Cookie Monster's eyes later. Tint the remaining buttercream with blue food coloring gel to achieve a nice bright blue color. Fill a disposable pastry bag fitted with a grass tip with the blue frosting. To pipe the fur, squeeze the frosting close to the surface of the cake then pull away as you release the pressure from the frosting bag. Repeat over the entire surface of the cake, taking care to go around Cookie Monster's mouth.
  • Pipe big circles of untinted buttercream for Cookie Monster's eyes, then add dots of black frosting for his pupils. Since Cookie Monster is googly eyed, the pupils should be in different spots on each eye.
  • Break a chocolate chip cookie in half to stick in his mouth, and add some crumbles of the other half of the cookie underneath his mouth to represent the haphazard way Cookie Monster eats cookies. 
  • Carefully remove waxed paper strips from underneath the cake and discard the paper. Store cake in refrigerator until several hours prior to serving. Allow cake to come to room temperature before eating.


Easy Vanilla Buttercream recipe
You're Gonna Bake It After All
Keyword birthday, cake, kids, party