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I am drooling over this Cake Batter Monster Cookie Cake. It's a simple recipe with amazing results!

Cake Batter Monster Cookie Cake

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  • Author: Julianne Dell
  • Prep Time: 15 minutes
  • Cook Time: 35 minutes
  • Total Time: 50 minutes
  • Yield: 8-10 slices
  • Category: Cookies
  • Method: Oven
  • Cuisine: American


This Cake Batter Monster Cookie Cake is an cake batter oatmeal cookie with MnMs and sprinkles. It’s topped with a little vanilla buttercream.


  • ½ c unsalted butter
  • ½ c sugar
  • 6 tbsp light brown sugar
  • 1 large Eggs
  • 2 tsp vanilla extract
  • ¾ c flour
  • ½ c yellow cake mix, dry
  • 1 c quick oats
  • ½ tsp salt
  • ½ tsp baking soda
  • ¼ c mini chocolate chips
  • ½ c MnMs candies
  • ¼ C sprinkles
  • For the frosting
  • ½ c unsalted butter
  • 2 c powdered sugar
  • 1 tsp vanilla extract
  • 1 tbsp milk
  • Additional Sprinkles for garnish


  1. Preheat oven to 350° F.
  2. Soften butter in the microwave 10-15 seconds. Combine butter with both light brown sugar and granulated sugar. Mix until smooth and mixture becomes fluffy.
  3. Add egg and vanilla extract and beat until egg is thoroughly incorporated.
  4. In a separate bowl, combine flour, dry cake mix, oats, salt and baking soda. Slowly add flour mixture to dough batter while mixing at a low speed.
  5. Once all the flour has been added, increase speed to medium until dough forms. Add mini chocolate chips. MnMs and sprinkles and mix until combined.
  6. Grease a 9-inch spring form pan with Crisco or cooking spray. Line the bottom of parchment paper or tin foil.
  7. Bake for 32-35 minutes at 350°F. During the last 10 minutes, cover the cookie cake with tin foil. Remove from oven and allow to cool until removing the edge of the pan.
  8. For the frosting
  9. Allow butter to soften for about 30 minutes. Or soften in the microwave for 10-15 seconds.
  10. Whip butter with a paddle attachment on medium speed until light and fluffy.
  11. Slowly add powdered sugar 1 cup at a time. Frosting will become thick. After powdered sugar have been added, add 1 tablespoon of milk. Whip until smooth. Pipe onto edges of cake and garnish with additional sprinkles.