Easy, Delicious(Microwave) Peanut Butter Fudge

This is way too easy and tasty to not make...make 2 batches, because you'll want to keep one and share the other!

2/3 c butter
2/3 c peanut butter
6 c powdered sugar
1/3 c milk
1 T vanilla

Place butter & pb in a microwave safe bowl.  Heat on high 2 min or until butter melts;  stir well.
Add the remaining ingredients;  stir until smooth.
Microwave on high about 1.5 minutes until smooth but not bubbly;  stir.  Pour into buttered square baking pan.
Cover & refrigerate at least 1 hour;  Cut into 1 inch squares; store in fridge.