Grease the pan with butter and line it with parchment paper.
Put peanut butter and butter in bowl and cover with plastic wrap. Poke holes on top of plastic wrap to vent and microwave for 2 minutes.
Carefully remove from microwave and stir before returning the bowl back to the microwave for another 2 minutes.
Remove from microwave and add vanilla and powdered sugar. Combine mixture well.
Spread the mixture in the prepared pan and use a spatula to even out the surface. Cover with overhanging parchment paper or a new piece of paper and refrigerate until it sets, about 2 hours.
Once the fudge has set, cut into squares. Can be enjoyed for up to one week.
Notes
After cutting up fudge into pieces, they can be frozen for up to two months
Keyword dessert, fudge, no bake, peanut butter, recipe