Spray a cookie sheet with PAM. Mix together ½ cup melted butter, peanut butter, powdered sugar, vanilla and brown sugar together and spread on cookie sheet.
Refrigerate 15 - 30 min.
Melt chocolate chips and 2 Tbsp butter together and spread on top. Let cool and enjoy!
Recipe by One Green Fork at https://www.onegreenfork.com/peanut-butter-bars/