Go Back
–+ servings

Alien Monster Cookies Mixed With Brownies

What's better than a perfectly themed Halloween brownie? A perfectly themed Halloween BROOKIE (a.k.a. a brownie and a cookie all in one!), of course! This Alien Moster Cookie Brownies recipe is the best of both worlds and is sure to become a fall favorite among your family and friends.
Print Recipe
close up of chocolate brownies with sprinkles and little green alien heads on top
Prep Time:10 minutes
Cook Time:30 minutes
Total Time:40 minutes

Ingredients

Brownie Ingredients:

  • 2 boxes of gluten free brownies mix 18.3 oz each
  • additional ingredients listed on the brownie boxes

Cookie Dough Ingredients:

  • ⅔ cup creamy peanut butter
  • 4 tbsp unsalted butter room temp
  • ½ cup light brown sugar
  • 4 tbsp white sugar
  • 2 large eggs
  • 1 tsp pure vanilla extract
  • ⅔ cup 1-to-1 gluten-free flour
  • ½ tsp baking soda
  • ½ tsp kosher salt
  • ½ cup quick oats
  • ½ cup miniature chocolate chips

Green Frosting Ingredients:

  • ½ cup unsalted sweet cream butter softened
  • 2 cup powdered sugar
  • 2 tsp pure vanilla extract
  • 2 tbsp heavy whipping cream
  • neon green gel food coloring
  • 1 large piping bags fitted with 1A round tip

Toppings & Mix-Ins:

  • 1 cup Halloween sprinkles
  • 1 package of mini candy eye decorations

Instructions

Prepare Brownie Batter:

  • Preheat oven to 350 degrees.
  • Prep 9 X 13 inch baking pan with nonstick baking spray.
  • Line the baking pan with parchment paper with extra on the four sides.
  • To make brownies, follow the ingredients and directions listed on the back of the boxes.
  • Pour the batter in the prepared baking pan.
  • Set aside.

Mix Cookie Dough:

  • Add the peanut butter and soft butter in a mixing bowl.
  • Use the paddle attachment of the electric mixer to combine.
  • Add the brown sugar, white sugar, eggs, and vanilla.
  • Beat until completely mixed.
  • In a second bowl add flour, baking soda and salt.
  • Whisk to blend.
  • Add the oats and chocolate chips.
  • Beat to blend all ingredients together.

Assemble and Bake Cookie Brownies:

  • Use a serving spoon to drop the oatmeal mixture over the brownie batter.
  • Sprinkle the Halloween sprinkles over the top.
  • Bake at 350 degrees for 25-25 minutes.
  • Insert a toothpick in the center to see if it is done.
  • When done, set on a counter for at least 30 minutes to cool.
  • Remove from the baking pan.

Make Green Frosting:

  • Using a standing mixer, beat the butter, powdered sugar, vanilla and heavy whipping cream with paddle attachment until combined, creamy and stiff.
  • Beat in a few drops of neon green food coloring and mix until blended.
  • Scoop the frosting into the piping bag.

Decorate Alien Cookie Brownies:

  • Pipe big and small dollop on the brownies.
  • Place two mini candy eyes in the frosting.
  • Allow frosting to firm up before enjoying!
Servings: 20 bars
Author: Vee