Press cookie dough evenly into an ungreased 13x9 baking pan.
Pour brownie ingredients in a large bowl and follow box directions for mixing eggs, water and oil. Pour batter over cookie dough and spread evenly around the pan.
Bake 35-40 minutes until done.
While brownies are baking, chop candy into crumbs. Sprinkle candy onto the brownies as soon as you take them out to cool. Candy should melt onto brownies.
Let cool and cut brownies.
I used Ghirardelli Chocolate Supreme Brownie Mix it only takes 1 egg.
If you can't find Peanut Butter Chocolate Chip Cookie dough, you can make your own from scratch or get Peanut Butter Cookie Dough and add chocolate chips to the brownie mix.