Preheat the oven to 250 degrees.
In large roasting pan mix together cereals, crackers, pretzels, and peanuts.
In microwave safe, 2-cup measuring cup, melt butter.
Add in Worcestershire sauce, seasonings and dry ranch.
Stir together with a fork until completely combined.
Pour over cereal/cracker mixture.
Sprinkle with Parmesan cheese.
Stir until all snack items are coated.
Cook in over for 1 hour and 15 minutes, stirring every 15 minutes, making sure to rotate snack mix on bottom of pan.
Allow to come to room temperature.
Store in air tight container.