1can14 ounces sweetened condensed milk (I use fat-free)
Line a 9x9” pan with foil and spray with cooking spray. Place the peanut butter cups in an even layer on the bottom of the pan.
Place chocolate chips and sweetened condensed milk in a medium saucepan over low heat. Stir until chips and milk are melted together. Keep in over low and don’t walk away!
Once everything is melted together, remove from heat and stir in vanilla extract. Spread evenly over peanut butter cups in prepared pan. Immediately sprinkle with chopped peanuts, pressing lightly to adhere them.
Cool until firm. I like to cool the fudge on the counter until it’s close to room temperature, then cover with plastic and place in the refrigerator to harden completely. Cut into squares and serve.