Spray 9x13" pan with cooking spray. Set aside.
In large pot, melt butter over medium heat.
Keep stirring until butter becomes slightly browned.
Add salt and marshmallows and stir well until they are completely melted.
Remove from heat and add Rice Krispie cereal, candy corn, and peanuts.
Pour into prepared pan and spread out evenly.
Let cool then cut into squares.
Enjoy!