Preheat your oven to 350°F. Line a 9×9 square pan with parchment paper and set aside.
Prepare your brownies according to the directions. Pour the batter into your prepared pan. Drop 5 large dollops of cookie butter on top of the brownie batter (like a 5 dice). Take a butter knife and drag the knife down the batter, making huge swirls and allowing the batter and cookie butter to marble a little. Don’t over mix!
Bake for 45 minutes, or until a knife inserted into the middle comes out mostly clean. Allow to cool and enjoy!