Add cereal, pretzels, cheerios and peanuts to the crock of a slow cooker.

In a separate bowl, mix together the butter, Worcestershire sauce and seasonings until fully combined.

Pour the sauce over the cereal mixture and stir until all of the dry ingredients are evenly coated with the seasoning. This make take a minute or so.

Cover the crock and cook on low for 3 hours, stirring once every hour.

When cooking is finished, spread the snack mix onto rimmed baking sheets and allow to cool completely (at least 30 minutes).

Serve or store in an air tight container.