Loaded Baked Potato Snack Mix

5 cups Chex cereal
4 cups shoestring potato chips
2 cups Cheez-Its
1/4 cup bacon bits
1/4 cup butter
1 package ranch dressing seasoning
1/2 cup Parmesan cheese, shredded

Combine the Chex, potato strings, Cheez-Its, and bacon bits in a large microwavable bowl.
Melt the butter and pour over the snack mixture, stirring to combine.
Stir in the ranch dressing seasoning and the Parmesan cheese.
Microwave the snack mixture for 3 minutes, stirring after each minute.
Spread the mixture out on a foil-lined pan to cool.