Heat oven to 350. Lightly spray a 9" x 13" baking pan w/ cooking spray. Unwrap cookie dough and press into bottom of pan.
Unwrap reese's peanut butter cups, and in rows of four, press into cookie dough. Make brownie mix as directed on box. Pour brownie mix over cookie and candy mix in pan.
Sprinkle w/ chocolate chips and peanut butter chips. Bake about 50 mins, rotating pan 1/2 way during baking. Check doneness w/ a toothpick inserted in center. Be careful not to burn the edges. Cool, cut into bars.