I found this recipe on Kevinandamanda.com. She always has the best recipes!
She call it: Ultimate Chocolate Chip Cookie 'n Oreo Fudge Brownie Bar
1 c (2 sticks) butter, softened
1 c sugar
3/4 c lt brown sugar
2 lg eggs
1 t vanilla
2 1/2 c self rising flour
2 c milk chocolate chips
1 pkg double stuff oreos
1 family size brownie mix
1/4 c hot fudge topping
Cream butter and both sugars in large bowl. Add eggs and vanilla and mix well. Slowly add flour. Stir in chocolate chips. Spread cookie dough in bottom of a 9 x 13 dish (she lined with wax paper and sprayed with pam but I just used my stone dish and it didn't stick)
Top with a layer of oreos.
Mix brownie mix according to directions. Add the hot fudge topping and mix well. Pour over cookie batter and oreos. Bake and 350 degrees for 45-55 minutes.
Serve warm and top with vanilla ice cream!
You can also half the recipe for a 8x8 brownie mix!