Ingredients

The following ingredients have 12 Servings
  • 1 box brownie mix (plus ingredients called for on box)
  • 1/2 cup butter (room temperature)
  • 1/2 cup peanut butter
  • 3/4 cup brown sugar
  • 1/4 cup white sugar
  • 1 large egg
  • 1 teaspoon vanilla
  • 1 3/4 cups flour
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 cup milk chocolate chips

Instruction

  • Preheat oven to 350 degrees and line a 9x13 baking dish with parchment paper.
  • Prepare the brownie mix according to package directions and set aside.
  • Add the butter, peanut butter, brown sugar, and white sugar to a large mixing bowl and beat well until smooth and creamy.
  • Beat in the egg and vanilla.
  • Add the flour, baking soda, and salt to the peanut butter mixture and mix until well combined.
  • Stir in the chocolate chips.
  • Pour the brownie batter into the prepared baking dish and then crumble half of the cookie dough evenly over the top of the brownie batter. Reserve remaining cookie dough for another use. See notes.
  • Bake for 25 minutes or until a tester comes out mostly clean 2 inches from the edge of the pan.
  • Let cool for at least 2 hours to allow brownies to continue firming up before slicing and serving.