Preheat oven: Set to 250°F (120°C).
Mix dry ingredients: Combine pretzels, Chex cereal, nuts, and sesame sticks in a large mixing bowl.
Prepare seasoning: Melt butter or warm olive oil, then whisk in ranch seasoning until smooth.
Combine thoroughly: Pour seasoned butter over dry mix and stir gently to coat evenly.
Bake for crunch: Spread mixture on a baking sheet and bake 45 minutes, stirring every 15 minutes.
Cool and store: Let the mix cool completely, then transfer to an airtight container. Keeps fresh for up to 2 weeks.