Chewy, chocolatey BROOKIES are a chocolate chip cookie/brownie hybrid! Loaded with chocolate chips and swirls of fudgy brownies and chewy cookie bits!
Be sure to check out the easy how-to VIDEO below the recipe!
Course brownies, cookie, Dessert
Cuisine American
Keyword brookie bars, brookies, halloween brownies
Prep Time 30 minutes
Cook Time 35 minutes
Total Time 1 hour 5 minutes
Servings 20 pieces
Calories 375kcal
Author Sam Merritt



  • 3/4 cup unsalted butter melted and cooled at least 10-15 minutes┬╣ (170g)
  • 2/3 cup tightly packed brown sugar light or dark (135g)
  • 1/4 cup white sugar 50g
  • 1 egg + 1 egg yolk room temperature preferred
  • 1 teaspoon vanilla extract
  • 2 cups all-purpose flour 250g
  • 1 teaspoon cornstarch
  • 1/4 teaspoon baking powder
  • 3/4 teaspoon salt
  • 1 cup semisweet chocolate chips 170g


  • 3/4 cup unsalted butter cut into Tbsp-sized pieces (170g)
  • 1/2 cup semisweet chocolate chips 90g
  • 1/2 cup natural cocoa powder 50g
  • 1/2 cup sugar 100g
  • 1 cup light brown sugar firmly packed (200g)
  • 2 large eggs + 1 egg yolk room temperature preferred
  • 1 teaspoon vanilla extract
  • 1/2 teaspoon salt
  • 1 cup all-purpose flour 125g
  • 1/2 cup mini chocolate chips optional (150g)


  • Preheat oven to 350F (175C) and lightly grease and flour sides and bottom of a 13x9 baking dish (or spray with baking spray). Set aside.


  • Combine melted, cooled butter and sugars in a large bowl and stir well. Add egg, egg yolk, and vanilla extract and stir again to combine. Set aside.
  • In a separate bowl, whisk together flour, cornstarch, baking powder, and salt.
  • Add dry ingredients to wet and stir until completely combined. Stir in chocolate chips. Set aside and prepare your Brownie batter.


  • Combine butter pieces and 1/2 cup chocolate chips in a large heat-proof bowl. Transfer to microwave and heat in 20-second intervals, stirring very well in between until chocolate and butter are completely melted and mixture is smooth.
  • Add cocoa powder and stir well.
  • Stir in sugars.
  • Add eggs, egg yolk, vanilla extract, and salt and stir to combine.
  • Add flour and stir until well mixed. If desired, stir in mini chocolate chips.


  • Alternate dolloping large spoonfuls of cookie dough and brownie batter into baking dish. Use a knife to swirl through both doughs and make sure the batter is in an even layer.
  • Transfer to 350F (175C) oven and bake for 35-40 minutes or until a toothpick inserted in the center comes out with a few moist crumbs or clean (make sure you're not sticking the toothpick into a chocolate chip!). Take care to not over-bake your brookies or they will be dry and crumbly once cooled.
  • Allow to cool and slice and serve. Enjoy!



┬╣The butter should not feel too warm to the touch or it will melt your sugars.


Serving: 1piece | Calories: 375kcal