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A decorated blue Cookie Monster cake on a plate, ready to be served with cake slices and milk.

cookie monster cookie cake

Chef Julia
Make a fun Cookie Monster cookie cake with chocolate chips & blue frosting! Perfect for birthdays & parties—easy, delicious & kid-approved!
Prep Time 25 minutes
Cook Time 22 minutes
cooling 28 minutes
Total Time 1 hour 15 minutes
Course Dessert
Cuisine American
Servings 12 slices
Calories 420 kcal

Ingredients
  

Cookie Cake Base:

  • 2 1/4 cups 280g all-purpose flour - spooned and leveled
  • 1 tsp baking soda
  • 1/2 tsp salt
  • 1 cup 225g unsalted butter, softened to room temperature
  • 3/4 cup 150g packed brown sugar
  • 3/4 cup 150g granulated sugar
  • 2 large eggs
  • 2 tsp vanilla extract
  • 2 cups 340g chocolate chips (mix of regular and mini chocolate chips recommended)

Cookie Monster Frosting:

  • 1 cup 225g unsalted butter, softened
  • 4 cups 480g powdered sugar
  • 2-3 tbsp milk or cream
  • 1 tsp vanilla extract
  • Blue gel food coloring not liquid
  • 2 Oreo cookies for eyes
  • 6 white chocolate chips for pupils

Essential Tools:

  • Large bowl and electric mixer
  • Baking sheet 12-14 inches
  • Parchment paper
  • #233 grass piping tip
  • Piping bag
  • Wire rack for cooling

Ingredient Notes:

  • Butter must be at true room temperature 65°F for proper creaming
  • Use gel food coloring instead of liquid for vibrant color without thinning frosting
  • For best texture use a mix of regular and mini chocolate chips
  • Oreos can be replaced with chocolate sandwich cookies if needed
  • For nut lovers: add 1/2 cup peanut butter to dough

Measurement Tips:

  • Always spoon flour into measuring cups and level off
  • Pack brown sugar firmly into measuring cup
  • Use standard US measuring cups and spoons
  • For metric measurements use a kitchen scale

Possible Substitutions:

  • Gluten-free: Use 1:1 gluten-free flour blend
  • Dairy-free: Substitute vegan butter and dairy-free chocolate
  • Egg-free: Use flax eggs 1 tbsp ground flax + 3 tbsp water per egg
  • Lower sugar: Reduce sugars by 1/4 cup each

Instructions
 

Prep Work (10 minutes)

  • Preheat your oven to 350°F (175°C)
  • Line a 12-inch baking sheet with parchment paper
  • Whisk together dry ingredients in a medium bowl:
  • 2 1/4 cups flour
  • 1 tsp baking soda
  • 1/2 tsp salt

Making the Cookie Dough (15 minutes)

  • In a large bowl, cream together:
  • 1 cup softened butter
  • 3/4 cup brown sugar
  • 3/4 cup granulated sugar
  • (Beat for 2-3 minutes until light and creamy)
  • Add wet ingredients:
  • 2 large eggs (one at a time)
  • 2 tsp vanilla extract
  • (Mix until fully combined)
  • Gradually fold in dry ingredients
  • Stir in 2 cups chocolate chips
  • (Reserve 2 tbsp for garnish)

Baking the Cookie Cake (22 minutes)

  • Transfer dough to prepared baking sheet
  • Shape into a 10-inch circle (1-inch thick)
  • Bake for 18-22 minutes until:
  • Edges are golden brown
  • Center looks set (it will firm up while cooling)
  • Cool on baking sheet for 5 minutes
  • Transfer to wire rack to cool completely

Making Blue Buttercream (10 minutes)

  • Beat 1 cup softened butter until smooth
  • Gradually add 4 cups powdered sugar
  • Mix in:
  • 2-3 tbsp milk
  • 1 tsp vanilla extract
  • Add blue gel food coloring:
  • Start with 3 drops
  • Add more to reach Cookie Monster blue

Decorating Your Masterpiece (15 minutes)

  • Frosting the Cake:
  • Spread thin base layer over cooled cookie
  • Chill for 10 minutes (helps prevent crumbs)
  • Creating the Fur:
  • Fit piping bag with #233 tip
  • Fill with remaining frosting
  • Pipe short bursts to create fur texture
  • (Work in sections from bottom up)
  • Adding the Face:
  • Place 2 Oreo cookies for eyes
  • Attach white chocolate chips as pupils
  • Use reserved chocolate chips for mouth

Notes

Nutrition Information (Per Serving)
Nutrient Amount
Calories 420 kcal
Total Fat 22g
Saturated Fat 13g
Protein 4g
Carbohydrates 55g
Fiber 1g
Sugars 40g
Cholesterol 75mg
Sodium 220mg
Nutritional values are estimates and may vary based on ingredient brands and portion sizes.
Keyword Chocolate Chip Cookie Cake, Cookie Monster Cookie Cake, Fun Dessert