In small bowl, mix sugar and cinnamon, set aside.

In large microwavable bowl, mix cereals and popcorn.

Melt butter in a cup in the microwave and pour over cereal mixture and stir until evenly coated.

Microwave uncovered on HIgh for 1 minute, stir, microwave 1 more minute, stir.

Sprinkle with half of the sugar mixture, stir. Sprinkle with the remaining sugar mixture, stir.

Microwave 1 minute longer.

Spread on waxed paper or paper towels to cool.

Conventional oven directions:

Preheat oven to 350. Pour mixture onto greased rimmed baking sheet or 9×13 pan and bake in preheated oven for about 10 minutes or until heated through. Allow to cool completely and store in airtight container or bag.