1 (16.3-oz.) container creamy peanut butter, or about 1-3/4 cups
1 (1-lb.) container vanilla frosting
Line a 9" x 9" pan with foil and set aside.
Add peanut butter and vanilla frosting to a medium sized microwave-safe bowl. Do not stir. Microwave for 1 minute, then stir until combined and completely smooth. Pour into prepared pan and spread evenly. Place in refrigerator until firm. Remove the fudge from the pan using the foil, and then cut fudge into squares.
This fudge is very creamy, with a texture that is a bit softer than traditional fudge. It's oh so good! The fudge freezes well, too. Just place it in an airtight container with layers of fudge separated by wax paper.