Preheat your oven to 250°F (120°C).
In a small saucepan over low heat, melt the butter. Stir in the Worcestershire sauce and ranch dressing mix until well combined.
In a large mixing bowl, combine the Rice Chex, Corn Chex, Cheez-Its, small pretzels, and redskin Spanish peanuts. Stir gently.
Pour the melted butter mixture over the dry ingredients. Gently toss until evenly coated.
Spread the mixture evenly on a large baking sheet. Bake for about 1 hour, stirring every 15 minutes.
Once golden and crispy, remove from oven and let cool completely before serving.
