In large microwavable bowl, measure cereal. Set aside. Line cookie sheet with waxed paper.
In medium microwavable bowl, microwave mint chips uncovered on Medium (50%) about 1 minute, stir. Microwave an additional 15 seconds at a time, until chocolate is mostly melted and can be stirred smooth. Pour over cereal, evenly coating pieces.
Microwave uncovered on High 3 minutes, stirring every minute. Spread on waxed paper; cool 5 minutes. Stir in candies. Store tightly covered.