Here's what I did:
First, squish a double batch of cookie dough on the bottom of an unstuck pan.
Then, spread double stuff oreos, and pour brownie mix over the top! I would do a double batch of brownie mix if I could do it over. It was still good though, and a hit at the party I brought it too (thankfully, they were gone so I didn't have to take any home :). Enjoy!