1. Preheat oven to 200 degrees F.
  2. Toss cereal, crackers, pretzels and chips together in a large bowl. Stir together taco seasoning and melted butter. Drizzle mixture over snacks and toss to coat.
  3. Divide snack mix on two large rimmed cookie sheets and bake for 1 hour, stirring and rotating pans after 30 minutes. Allow to cool completely before serving.