Prepare a 9 x 13 baking pan by spraying (or coating with butter or goop) with bakers spray on sides. Place a piece of parchment paper snuggly in the bottom of the pan.
In a medium saucepan over low heat, pour in two bags of candy corn and 1/4 cup water. This is approximately 4 cups of candy corn.
Cook over low heat, stirring occasionally, for about 20 minutes. You will want the candy corn to melt completely.
Remove from heat.
Add peanut butter to candy corn reduction and stir together until full combined.
Put all cereal in a large bowl and pour the candy corn mixture over the cereal. Stir to coat all the cereal.
Pour cereal into prepared pan and press it flat. You can do this with your hands (coat them with bakers spray as often as needed) or with a spatula.
Immediately after you get the cereal flattened, pour candy over the top and level it out. Gently press candy corn into cereal mixture.