Place chocolate in a small microwave-safe bowl. Microwave at HIGH 1 minute or until chocolate melts, stirring every 15 seconds. Stir in peanut butter until smooth. Working with 1 pretzel at a time, dip and roll 1 end of pretzel in chocolate mixture to coat. Place pretzel on prepared pan. Repeat procedure with remaining pretzels and chocolate mixture. Place in freezer for 30 minutes or until set.