In small bowl, mix sugar and cinnamon; set aside.
In large microwavable bowl, microwave butter uncovered on High about 40 seconds or until melted. Stir in cereals until evenly coated. Microwave uncovered 2 minutes, stirring after 1 minute.
Sprinkle half of the sugar mixture evenly over cereals; stir. Sprinkle with remaining sugar mixture; stir. Microwave uncovered 1 minute. Stir in raisins. Spread on paper towels to cool.