Melt candy chips by microwaving 30 seconds then stirring and repeating until melted.
Add Pumpkin and stir to combine.
Spread cereal on lined tray(s) and pour mixture over cereal.
In a bowl add spice to powdered sugar and mix well.
Sprinkle sugar mixture cereal and toss to coat well.
Leave on tray(s) to dry out for a while.
Add M&M's when you transfer to a serving bowl.