Preheat Oven: Preheat oven to 250℉.
Mix Cereal and Nuts: Add all of the cereal, nuts, bagel chips, and pretzels to a large bowl and mix well.
Melt Butter: Add butter, Worcestershire sauce, garlic, onion, and thyme to a small saucepan and heat over medium low to melt the butter. Once the butter is melted, remove from the heat, add the ranch dressing mix, and whisk well.
Mix: Pour melted butter mixture over the chex mix and stir well so it is all lightly coated.
Bake: Add the mix to a baking sheet and bake for 1 hr, stirring every 20 minutes.
Serve and Enjoy or store in an airtight container at room temperature for up to 2 weeks.