Preheat oven to 250 degrees Fahrenheit (120 degrees Celsius).
In a large roasting pan (one with nice deep sides), mix cereal, crackers, pretzels, rye chips, and nuts. Set aside. Melt butter in a small microwaveable bowl. Whisk in Worcestershire sauce, seasoned salt, garlic powder, onion powder, and cayenne pepper. Pour over the cereal mixture and toss with a large spatula until evenly coated.
Place in oven and bake for 1 hour and 15 minutes, stirring every 15 minutes. Remove from oven and spread onto parchment paper (or paper towels) to cool for about 20 minutes before serving.
Notes
Recipe Source: Adapted from ChexTo STORE Chex Snack Mix with Cheez-Its, place it in an airtight container at room temperature. It will stay fresh and crunchy for up to two weeks. We don't recommend freezing as it may alter the texture.If you need to REHEAT, spread the mix on a baking sheet and warm it in a preheated oven at 250 degrees Fahrenheit (120 degrees Celsius) for 10-15 minutes, stirring occasionally.