Preheat your oven to 250°F (120°C).
In a large mixing bowl, combine the Corn Chex, Wheat Chex, Rice Chex, Cheerios, skinny bite-sized pretzels, and salted nuts. Stir gently to mix.
In a separate small bowl, whisk together the melted butter, Worcestershire sauce, seasoned salt, garlic powder, onion powder, and dried thyme.
Pour the seasoning mixture over the dry ingredients and toss gently until evenly coated.
Line a baking sheet with parchment paper and spread the mixture evenly in a single layer.
Bake in the preheated oven for 1 hour, stirring every 15 minutes.
Once baked, remove from oven and allow to cool completely before serving or storing.
