# Steps:
01 - Line an 8x8-inch baking pan with parchment paper, allowing an overhang for easy removal.
02 - In a medium saucepan over medium heat, combine butter and peanut butter, stirring constantly until smooth and fully melted, about 3 to 4 minutes.
03 - Remove saucepan from heat and stir in pure vanilla extract.
04 - Gradually add sifted confectioners sugar, stirring vigorously until the mixture is smooth and thick.
05 - Pour the mixture into the prepared pan and smooth the surface with a spatula.
06 - Refrigerate for at least 1 hour or until firm.
07 - Lift fudge out using parchment overhang, cut into 36 squares, and serve chilled or at room temperature.