Prepare brownies to package instructions.
Once done baking brownies - set aside to cool slightly & start working on your PayDay topping
In a medium saucepan - melt butter & peanut butter chips until combined
Add condensed milk & marshmallow creme & stir well until fully incorporated & marshmallow is melted
Pour over prepared brownies & smooth into a nice even layer
Top with peanuts
Place in refrigerator to cool quickly
Cool completely before cutting
Store at room temperature in airtight container