01 -
Line an 8x8-inch (20x20 cm) square baking pan with parchment paper, leaving an overhang for easy removal.
02 -
In a medium saucepan over low heat, combine the white chocolate chips, peanut butter, and sweetened condensed milk. Stir constantly until the chocolate is completely melted and the mixture is smooth (about 5 minutes).
03 -
Remove from heat and stir in the vanilla extract.
04 -
Pour the mixture evenly into the prepared pan. Use a spatula to smooth the top.
05 -
If desired, sprinkle chopped peanuts and a pinch of flaky sea salt over the top.
06 -
Refrigerate for at least 2 hours, or until fully set.
07 -
Once set, lift the fudge out of the pan using the parchment overhang. Cut into 24 squares with a sharp knife. Serve chilled or at room temperature.