Place butter and peanut butter in microwave safe bowl. Cover with plastic wrap with poked steam holes.
2 stick Butter, 1 cup Peanut Butter
Microwave for 4 mins on high, stir halfway.
Line 8x8 or 9x19 pan with parchment paper.
Quickly mix powdered sugar into heated mixture adding vanilla halfway through.
3 3/4 cup Sugar, 1 tsp Vanilla Extract
When fully mixed, dump in pan and smooth to edges. Cover with parchment paper. Refrigerate for at least 2 hours.
Once set, remove and cut into squares as desired.