Lightly grease your baking dish, with cooking spray, (8″x8″) or (9″x5″) casserole or baking dish and set aside.
Place Butter in a large pot and melt on medium heat. Once butter is completely melted add the marshmallows and continue to heat until they have all melted. Watch the heat to make sure it doesn’t burn Remove from heat.
Immediately add your mixed cereal. I used two different kinds, but feel free to use 1,2,3 or more that will compliment each other.
While mixing make sure that all cereal is coated with butter-marshmallow mixture. Melt chocolate (Nestle brand melts the best) and drizzle on top if you choose.
Allow to set up for at least an hour. It will need to be covered with press and seal after.