Preheat oven to 375 degrees. Line a large baking sheet with foil. Set pan aside.
Slice potatoes into 8 long wedges and place wedges into a large bowl.
In a separate smaller bowl, add the Parmesan cheese, parsley, dry dressing mix, onion powder, garlic powder, salt and pepper. Mix to combine. Sprinkle cheese mixture over potato slices and toss with hands to coat.
Place potato wedges onto prepared baking sheet, and sprinkle remaining cheese mixture over the top of the potatoes. Bake at 375 degrees for 33-35 minutes. Remove from oven and let cool slightly for 5 minutes. Serve with additional Parmesan cheese and parsley, if desired.