01 - Cut the peeled sweet potatoes into evenly sized 1/4-inch thick fries for consistent cooking.
02 - Place the fries in a large bowl and cover with cold water. Soak for 30 minutes to remove excess starch, then drain and pat thoroughly dry with paper towels. This step is optional but recommended for maximum crispiness.
03 - In a large bowl, toss the dried fries with olive oil until evenly coated. Sprinkle with cornstarch, smoked paprika, garlic powder, salt, and black pepper. Toss vigorously until all fries are uniformly seasoned.
04 - Preheat the air fryer to 400°F for 3 minutes before cooking.
05 - Arrange the seasoned fries in a single layer in the air fryer basket. Work in batches if necessary to avoid overcrowding, which prevents proper crisping.
06 - Air fry for 15-18 minutes, shaking the basket halfway through the cooking time, until fries are golden brown and crispy. Cooking time may vary based on fry thickness and air fryer model.
07 - Transfer to a serving plate and garnish with additional sea salt if desired. Serve hot with your favorite dipping sauce such as ketchup or chipotle mayo.