01 -
In a glass bowl, combine the peanut butter, butter, and vanilla, then heat in the microwave for 90 seconds. Stir the mixture until it is smooth and creamy.
02 -
Gradually add the powdered sugar to the bowl, about a cup at a time, stirring well after each addition until completely combined.
03 -
Grease an 8-9 inch pan with butter or line it with parchment paper. Spread the fudge mixture evenly into the prepared pan, pressing it down gently to ensure it fills the pan completely.
04 -
Chill the fudge in the refrigerator for at least 4 hours or until firm. Once set, cut into 1-inch squares and store in an airtight container in the refrigerator.
05 -
For stovetop preparation, combine the peanut butter, butter, and vanilla in a medium-sized saucepan over medium-low heat. Stir constantly until smooth and creamy, then remove from the heat before adding the powdered sugar as directed above.