Prepare the potatoes: Wash and dry the potatoes thoroughly. Prick each potato several times with a fork to allow steam to escape during cooking.
Season the potatoes: Lightly spray the potatoes with olive oil. Sprinkle evenly with Kosher salt and freshly ground black pepper.
Preheat the air fryer: Set your air fryer to 400°F (200°C) and let it preheat for 2-3 minutes.
Cook the potatoes: Place the seasoned potatoes in the air fryer basket in a single layer. Cook for 35-40 minutes, turning them halfway through to ensure even cooking.
Check for doneness: Insert a fork into one of the potatoes to ensure it is tender. If it slides in easily, the potatoes are done.
Serve: Remove the potatoes from the air fryer and let them cool for a few minutes. Serve with your favorite toppings, such as butter, sour cream, chives, or shredded cheese.