Heat the oven to 350 degrees.
Line a baking sheet or 8 x 8 pan with parchment paper.
Spray parchment paper with non-stick baking spray.
Roll out the cookie dough and spoon into the baking pan, ensuring that it’s even.
Layer the Oreo cookies on top of the cookie dough.
Pour the brownie batter over the Oreos so that they’re completely covered.
Bake for 30 minutes, or until done.
Remove from oven and let sit for 10 minutes.
Once slightly cooled, lift the dessert out of the pan and onto a cutting board.
Cut into pieces and enjoy.