This really isn't a recipe as much as quick directions, which is nice when you need a dessert that looks more complicated than it actually is. Here's the break down...
Buy cookie dough, Oreo cookies, and brownie mix. Any flavor, style, type that you want. Chunky cookie dough, Double Stuft Oreos, and dark chocolate brownie mix? Cool. PB cookie dough, vanilla Oreos, and fudge brownie mix? Sure, why not. I was
I used an 9 x 13 Pyrex dish for my brownies. Line your pan with aluminum foil and then spray it with non stick spray. Trust me, you'll appreciate this later.
Press your cookie dough into the bottom of the pan evenly. Then, top with Oreo cookies edge to edge across the whole pan. Then, prepare your brownie batter per the directions and pour all over the top.
I KNOW, RIGHT?! This should be illegal.
Bake at 350* for about 40 minutes. Test the middle for doneness if you're not sure. Let it cool for about 5-10 minutes (but not too long! Warm brownies are the best!) then pull the brownies out of the tray by the foil and lay on a cutting board.
Cut up and enjoy! Don't worry, I won't judge the size of your piece. ;-)