Add the cereal to a large mixing bowl.
Melt the chips in 30 second intervals in the microwave on high, mixing in between.
When melted and smooth, mix in the ½ cup pudding mix.
Pour over the cereal, and gently mix.
In a large freezer bag, add the powdered sugar and the 2 tablespoons of the pudding mix, and shake until combined.
Pour cereal in the freezer bag and shake until well coated.
Add coated cereal into a large bowl and add in Reese’s pieces and candy corn, mix until evenly combined.