Preheat your oven to 300 degrees F. Line a baking sheet with parchment paper.
In a large mixing bowl add the rice squares cereal, corn squares cereal, cheddar cheese crackers, pretzels, and peanuts. Mix together.
In a small pan heat 1/2 cup of butter on medium heat. Cook until you have little flecks of brown in the butter to make brown butter. Add the light brown sugar, honey, maple syrup, and sea salt. Stir together.
Add the topping to the the large mixing bowl of snack ingredients. Stir to combine.
Add the snack mix to the baking sheet lined with parchment paper. Spread evenly.
Cook for 25-30 minutes stirring the snack mix every 10 minutes.
Remove from the oven and stir to break up some of the big pieces. Allow to cool
Once cooled add the candy corn and peanut butter chocolate candy.