1In large microwavable bowl, mix cereal, pretzels and crackers.
2In small microwavable bowl, microwave butter uncovered on High about 30 seconds or until melted. Pour over cereal mixture; stir until evenly coated. Stir in dressing mix and cheese until evenly coated.
3Microwave uncovered on High 3 minutes, stirring after each minute. Spread on waxed paper or foil to cool. Store in airtight container.