Coat a 9x13 pan, I prefer using Bak-Klene ZTNonstick Baking Spray from Williams Sonoma.
Make the brownie batter in accordance with the directions on the back of the box and bake for 20-25 minutes or as directed by the brownie box.
Remove from oven and top with peanuts, marshmallows, and peanut butter cups and return to oven for an additional 5 minutes.
In a medium bowl combine chocolate chips and peanut butter in a microwave-safe bowl and microwave for 1 minute, until combined and creamy.
Add in the Rice Krispies to your melted chocolate mix, stirring until completely coated.
Pour Rice Krispie mixture over top the brownies and chill for several hours before cutting