Prepare the Baking Dish by lightly greasing an 8-inch square baking dish. Line with parchment paper or foil for easy removal later.

Melt the Peanut Butter and Butter in a medium saucepan over medium heat, stirring occasionally until both melt into a smooth mixture (about 3 to 5 minutes).

Incorporate the Sweetness by removing from heat and stirring in the icing sugar and vanilla extract until smooth. Optionally add a pinch of salt.

Pour into the Prepared Dish, carefully spreading the mixture evenly to create a silky surface.

Allow to Cool and Set for about an hour at room temperature or 30 to 60 minutes in the refrigerator.

Cut and Serve using parchment overhang to lift the fudge out of the dish and slice into 1-inch squares.