Easy Peanut Butter Fudge

Microwave butter and peanut butter for 2 minutes on high in a microwave bowl. Stir, than microwave for 2 more minutes. Add vanilla and sugar to the peanut butter mixture and stir to combine. Pour into a buttered 8 by 8 inch pan lined with waxed paper. Place a piece of waxed paper on the surface of fudge and refrigerate until cool. Cut into 1-inch pieces and store in an airtight container for up to one week in refrigerator.