Go Back
–+ servings
Brookie bars brownies
Print

Cookie Brownie Bars from Brownie Mix

Easy cookie brownie bars from brownie mix with fudgy brownies topped with a chocolate chip cookie layer.
Course Dessert
Cuisine American
Prep Time 10 minutes
Bake Time 25 minutes
Total Time 35 minutes
Servings 16
Calories 97kcal
Author Nora Rey
Cost $4-$6

Equipment

  • 9x9-inch pan

Ingredients

Brownie layer

  • 1 box brownie mix (about 18 ounces)
  • Eggs room temp & lightly beaten (see box for amount)
  • Water  sub:milk, buttermilk, or coffee (see box for amount)
  • Neutral oil (see box for amount)
  • ½ teaspoon instant coffee or ¼ teaspoon espresso powder  (optional)

Cookie layer

  • 3 tablespoons melted butter salted or unsalted
  • 2 tablespoons granulated sugar
  • 2 tablespoons brown sugar light or dark
  • 1 egg yolk
  • ½ teaspoon vanilla extract
  • ¼ teaspoon baking soda
  • ¼ teaspoon kosher salt use half for fine salt
  • ½ cup all-purpose flour
  • ¼ cup bittersweet or semisweet chocolate chips (reserve some for topping)
US Customary - Metric

Instructions

  • In a bowl, mix melted butter, granulated sugar, brown sugar, egg yolk, and vanilla until smooth.
  • Stir in baking soda and salt.
  • Using a spatula, mix in flour just until no dry flour is showing.
  • Add most of the chocolate chips, saving a few for the top.
  • Prepare brownie batter according to the package directions and spread evenly in a 9×9-inch pan.
    Spoon dollops of cookie dough on top, gently spread with a knife, then sprinkle remaining chocolate chips.
  • Bake according to the package directions. If the cookie layer browns too fast, loosely cover with foil.
  • Let bars chill in the fridge for at least an hour before cutting.

Notes

 
  • Brownie mix: Any brand works — follow the box directions.
  • Water: You can use milk, buttermilk, or brewed coffee for richer brownies.
  • Instant coffee: Optional, but makes the chocolate taste stronger and keeps bars from tasting too sweet.
 
Storage
Store cookie brownie bars covered in the fridge for up to 5 days. Let sit at room temperature for a few minutes before serving.
 
Tips for Best Bars
  • Line the pan with parchment so brownies don't stick.
  • Start checking a few minutes early to avoid overbaking.
  • A toothpick in the brownie layer with a few moist crumbs means fudgy bars.
  • Chill before slicing for cleaner cuts.

Nutrition

Calories: 97kcal | Carbohydrates: 7g | Protein: 1g | Fat: 7g | Saturated Fat: 2g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Trans Fat: 1g | Cholesterol: 39mg | Sodium: 82mg | Potassium: 17mg | Fiber: 1g | Sugar: 4g | Vitamin A: 112IU | Calcium: 7mg | Iron: 1mg