Place cereal in large bowl. Set aside. Microwave chocolate, marshmallow creme, peanut butter and 1 teaspoon of the cinnamon in medium microwavable bowl on HIGH 1 minute; stir. Microwave 20 to 30 seconds longer or until mixture can be stirred smooth. Stir in vanilla.
Pour over cereal; toss until evenly coated. Add 1/2 cup of the confectioners’ sugar and remaining 1 teaspoon cinnamon; toss to coat well.
Spread in single layer on wax paper-lined baking sheet. Let stand 10 minutes or until cooled. Sprinkle with remaining 1/2 cup confectioners’ sugar; toss again to coat well. Store in airtight container.