Prepare the Potatoes: Wash and peel the potatoes, if desired. Cut them into waffle-shaped fries using a waffle fry cutter, or slice them into criss-cross shapes with a knife.
Soak the Fries: Soak the fries in cold water for at least 30 minutes to remove excess starch, helping them become crispier when fried.
Heat the Oil: Heat vegetable oil in a large pot or deep fryer to 375°F (190°C) using a thermometer. Ensure the oil is hot enough for frying.
Fry the Fries: Carefully add the fries in small batches to the hot oil. Fry for about 3-4 minutes until golden and crispy. For extra crispiness, double fry by frying once at a lower temperature, cooling, then frying again at a higher temperature.
Season the Fries: Remove the fries and drain them on paper towels. Season immediately with salt, pepper, and optional spices like paprika, garlic powder, onion powder, or cayenne pepper.
Serve: Serve the fries hot with your favorite dipping sauces, such as honey mustard or barbecue sauce.