Preheat oven to 275º. In a large bowl, add peanuts, pretzels, chex cereal, and sunflower seeds. In a small bowl, whisk together butter or olive oil, Worcestershire sauce, as well as the garlic powder, onion powder, parsley, and seasoned salt. Pour over peanut mixture and toss.

Spread mixture out onto a baking sheet lined with parchment.

Bake for 1 hour, tossing mixture halfway through baking time. Remove and sprinkle in Parmesan cheese crisps. Allow to cool completely before putting in an air-tight container to store (if it even lasts that long!). Enjoy!