1. Line cookie sheet with wax paper.
2. Place peanut butter chips and shortening in large microwave-safe bowl. Microwave at MEDIUM (50%) 1-1/2 minutes; stir until chips are melted and mixture is smooth. If necessary, microwave an additional 10 seconds at a time, stirring after each heating, until chips are melted when stirred. Stir in peanuts.
3. Drop by rounded teaspoons onto prepared cookie sheet. (Mixture may also be dropped into small candy paper cups.) Cool until set. Store in a cool, dry place. About 2-1/2 dozen snacks.
BUTTERSCOTCH NUT CLUSTERS: Follow above directions using 1-3/4 cups (11-oz. pkg.) HERSHEY'S Butterscotch Chips instead of peanut butter chips.