1. Remove wrappers from peamnut butter cups; cut or break into small pieces.
2. Place peanut butter cup pieces and heavy cream in small microwave-safe bowl. Microwave at MEDIUM (50%) 30 seconds; stir. If necessary, microwave at MEDIUM an additional 10 seconds at a time, stirring after each heating, until candy is melted and mixture is blended when stirred.
3. Pour over ice cream. Top with additional chopped peanut butter cups, peanuts and whipped cream, if desired. 1 sundae