Cut the potatoes lengthways into long wide fries, approximately 3/4 inch wide and 1/3 inch thick.
Soak the fries in cold water for 20-30 minutes.
Rinse thoroughly and pat dry with paper towels.
Place the fries in a large bowl and drizzle with oil, or spritz with oil for a lighter version [Note 2].
Preheat air fryer to 360°F/ 180°C.
Mix the smoked paprika, onion powder, garlic powder and salt together in a small bowl, then sprinkle over the fries. Toss the fries to coat evenly in the seasoning and oil.
Place steak fries in air fryer basket, and air fry for 15-20 minutes for frozen steak fries, or 20-25 minutes if using homemade steak fries until fries are golden brown and crispy.
Shake the basket 2 or 3 times during cooking to redistribute the fries and ensure they cook evenly.
Notes
Choose a cooking oil with a high smoke point: light olive oil, vegetable oil, corn oil, or avocado oil are good options.