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A slutty brownie on a plate.
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Slutty Brownies

These Slutty Brownies are a chocolate lover's dream! Chocolate chip cookie dough is topped with crumbled Oreo cookies, and brownie batter is layered on top. Three desserts in one, these brownies are rich, fudgy, and full of chocolate, of course!
Prep Time15 minutes
Cook Time40 minutes
Cooling Time2 hours
Total Time2 hours 55 minutes
Course: Dessert
Cuisine: American
Keyword: brownies, slutty brownies
Servings: 16 pieces
Calories: 541kcal
Author: Kasey Schwartz


  • 9” square pan
  • Large mixing bowl
  • Electric hand mixer or stand mixer with paddle attachment
  • Measuring cups
  • measuring spoons
  • Baking spray


Cookie Dough Layer

  • 1 cup butter softened
  • 1 ¼ cup light brown sugar
  • 1 egg
  • 1 Tablespoon vanilla extract
  • 2 1/4 cups flour
  • 1 teaspoon salt
  • ½ teaspoon baking powder
  • ¼ teaspoon baking soda
  • 1 cup chocolate chips
  • 18 Oreos

Brownie Layer

  • cup unsweetened cocoa powder
  • ½ cup flour
  • ½ teaspoon salt
  • ½ teaspoon baking powder
  • ¾ cup butter melted
  • 1 cup light brown sugar
  • 1 Tablespoon vanilla extract
  • 2 eggs
  • ½ cup chopped walnuts optional


  • Start by making the cookie dough layer. Beat the butter and light brown sugar together until light and fluffy. Be sure to scrape down the sides of the bowl to make sure all the butter is well blended.
    1 cup butter, 1 ¼ cup light brown sugar
  • Add the egg and vanilla and mix until smooth.
    1 egg, 1 Tablespoon vanilla extract
  • Add the flour, salt, baking powder and baking soda and mix into a smooth, thick dough.
    2 1/4 cups flour, 1 teaspoon salt, ½ teaspoon baking powder, ¼ teaspoon baking soda
  • Stir the chocolate chips into the batter by hand.
    1 cup chocolate chips
  • Spray a 9x9 baking dish with baking spray or brush it with melted butter.
  • Add the cookie dough to the greased pan and press it into the bottom of the pan, making it flat and even.
  • Make a layer of Oreos on top of the cookie dough. Try to cover the cookie dough completely, breaking the cookies as needed to make sure they fit.
    18 Oreos
  • Place the pan in the fridge while you make the brownie layer.
  • Preheat your oven to 350℉.
  • Sift the cocoa powder, flour, salt and baking powder together into a medium sized bowl. Set aside.
    ⅔ cup unsweetened cocoa powder, ½ cup flour, ½ teaspoon salt, ½ teaspoon baking powder
  • Beat the eggs, melted butter, sugar and vanilla together. Beat for about 5 minutes so the mix is thick. This will make the brownies have that nice, thin, crispy top.
    ¾ cup butter, 1 cup light brown sugar, 2 eggs, 1 Tablespoon vanilla extract
  • Stir in the dry ingredients until smooth.
  • Pour the brownie batter into the pan, over the top of the Oreo layer and shake the pan a little so it settle into a flat layer. Sprinkle walnuts on top, if using.
    ½ cup chopped walnuts
  • Bake the bars for 40 minutes. A toothpick inserted into the center will come out mostly clean- a little bit sticky is okay but if the toothpick is completely covered in batter, bake for a few more minutes
  • Let the bars cool for about 2 hours. They will slice easier when they are not hot.


Serving: 1serving | Calories: 541kcal | Carbohydrates: 67g | Protein: 5g | Fat: 30g | Saturated Fat: 16g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 7g | Trans Fat: 1g | Cholesterol: 84mg | Sodium: 469mg | Potassium: 244mg | Fiber: 3g | Sugar: 42g | Vitamin A: 666IU | Vitamin C: 0.05mg | Calcium: 70mg | Iron: 4mg