In large microwavable bowl, microwave butter uncovered on High 30 to 45 seconds or until melted. Add marshmallows; stir to coat. Microwave on High 1 minute 15 seconds to 1 minute 20 seconds, stirring every 30 seconds, until mixture can be stirred smooth. Stir in cereal and 1 1/2 cups fruit flavored snacks until well coated. Press mixture evenly in pan.