Heat your air fryer to 400°F. While it's warming up, rinse, scrub, and dry 2 medium sweet potatoes. Use a fork to make a few pricks in the potatoes. Drizzle them with 1 teaspoon of neutral oil and use your hands to ensure they're evenly coated. Season the potatoes all over with 1/2 teaspoon of kosher salt.

Place the prepared potatoes in the air fryer. Air fry them until they become tender and can be easily pierced with a paring knife, which should take around 35 to 40 minutes. Remove them from the air fryer with tongs. Slice the potatoes in half lengthwise, then fluff the flesh with a fork. Serve with butter, salt, and pepper, or add your preferred toppings.