1. Preheat an oven to 350º and spray a 12″ oven-safe skillet with cooking spray (if using a larger skillet, use more Oreos to create a full layer). Press cookie dough into bottom of skillet. Add a layer of Oreos on top and pour over 2/3 of the brownie batter (bake remaining brownie batter separately, if desired).
2. Top brownie layer all over with crushed Oreos and bake until a toothpick inserted in the brownie layer is only slightly gooey, about 35 minutes.
1 log refrigerated chocolate chip cookie dough (such as Pillsbury)
18 Oreos, plus more crushed for topping
1 box brownie mix, plus ingredients called for on the box
Vanilla ice cream, for serving
Warm chocolate Sauce, for serving
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