Prep the potatoes: Scrub and peel if you like (peels add texture). Cut into 1/4- to 1/3-inch sticks. Keep sizes even for consistent cooking.
Soak for crispness: Place cut potatoes in a bowl of cold water for 20–30 minutes.
This pulls out excess starch and helps fries crisp up.
Dry thoroughly: Drain and pat the fries very dry with clean towels. Moisture is the enemy of crisp.
Preheat the air fryer: Set to 380°F (193°C). A warm basket helps the fries start crisping right away.
Season the oil: In a large bowl, mix oil, salt, garlic powder, onion powder, and half the pepper.
Toss in the fries to coat evenly.
First cook: Arrange fries in a single layer in the air fryer basket. A little overlap is okay, but don’t pack them in. Cook 10 minutes.
Shake and continue: Shake the basket or flip fries.
Cook 8–12 more minutes, shaking once more, until golden and crisp at the edges.
Lemon pepper finish: Immediately toss hot fries with lemon zest, remaining pepper, and a squeeze of lemon juice (start with 1–2 teaspoons). Taste and adjust salt and pepper. If the lemon is extra tangy, add a tiny pinch of sugar.
Serve hot: Garnish with parsley if you like.
Serve with aioli, ketchup, or a lemony yogurt dip.