Preheat your oven to 425°F (220°C). A hot oven is key to achieving crispy fries.
Wash and peel the russet potatoes if desired. Cut them into evenly sized fries, about 1/4 inch thick, to ensure they cook uniformly.
(Optional) Soak the cut fries in cold water for at least 30 minutes to remove excess starch. This step can help achieve an extra crispy texture.
After soaking, drain the fries and pat them dry with a clean kitchen towel. Removing moisture is crucial for crispiness.
In a large bowl, combine the dried fries with olive oil, garlic powder, salt, and black pepper. Toss until all the fries are evenly coated.
Spread the seasoned fries in a single layer on the baking sheet. Bake for 25-30 minutes, flipping halfway through, until they are golden brown and crispy.
Remove the fries from the oven and immediately sprinkle the freshly grated Parmesan cheese over the top. Return to the oven for an additional 3-5 minutes until the cheese is melted and bubbly.
Once out of the oven, garnish with finely chopped fresh parsley if desired. Serve hot and enjoy your delicious Garlic-Parmesan Fries!