Line an 8×8 inch square baking dish with parchment paper or foil, leaving an overhang for easy removal.
In a microwave-safe bowl, combine the chocolate chips, peanut butter, and sweetened condensed milk.
Microwave the mixture in 30-second intervals, stirring well after each interval, until the chocolate and peanut butter are melted and the mixture is smooth. This usually takes about 1-2 minutes total.
Stir in the vanilla extract and a pinch of salt.
Pour the fudge mixture into the prepared baking dish and spread it evenly.
Refrigerate for at least 2-3 hours or until the fudge is set.
Once set, remove the fudge from the dish and cut it into small squares…