Preheat oven to 400 degrees.
Peel and cut potatoes into matchstick slices, ½ - inch wide and ¼ - inch thick.
Place potato slices in a gallon zip-top bag and toss with olive oil, ½ teaspoon salt and ¼ teaspoon pepper.
Line two baking sheets with parchment paper.
Layer potato slices in a single layer on each baking sheet.
Bake fries in preheated oven for 30-35 minutes, flipping halfway through.
During the last five minutes of baking, heat butter and garlic over medium heat in a small saucepan for 1-2 minutes, stirring constantly. When garlic starts to brown, remove from heat.
In a large bowl combine fries, garlic butter, ½ teaspoon salt, ¼ teaspoon pepper, Parmesan, and parsley. Toss until fries are evenly coated.
Serve immediately and enjoy!