Line the inside of a 9×9 pan with aluminum foil and spray with cooking spray. Unwrap all the Reese’s peanut butter cups and line the bottom of your pan with peanut butter cups. I used 18 on the bottom.
In a sauce pan slowly heat the sweetened condensed milk.
Add chocolate chips and stir until melted about 2 minutes on medium heat.
immediately Pour the chocolate mix over your Reese’s. Press the remaining chopped peanut butter cups on the top.