Prep potatoes. Wash russet potatoes with cold water. Using a fork, poke holes in the potatoes so they don't explode while baking. Add a little bit of oil. Add a few generous pinches of salt and cranks of freshly ground black pepper. Using your hands, rub the potatoes all over with the oil, salt, and black pepper.
Bake potatoes. Place potatoes in a preheated Air Fryer. Bake at 380F for 40 minutes, depending on size. *If they are smaller, bake for 30-35 minutes. If they are larger, you may need 45+ minutes. Make sure to flip the potatoes halfway for even cooking.
*NOTE: Potatoes are fully cooked when they are tender and appear to have shrunk into their papery skins. Press the potato gently -- the potato should "give" slightly and feel soft and tender. Or, use a knife -- it should slide in easily.
Rest. When the potatoes are done baking, rest the potatoes. Keep them in the Air Fryer, undisturbed, for 5-10 minutes. An optional step that creates a meltingly soft and fluffy texture. Doing so gives the potatoes extra time to steam inside their jackets.
Add toppings. Using a sharp knife, cut into the potato lengthwise. Squish the potato slightly -- the insides should collapse a little. Season the inside with salt and pepper. Add a generous pat of butter. Add cheddar cheese and heat for 30 seconds in the microwave until melted and gooey. Add a dollop of sour cream, sprinkle of green onion, and top with crumbled bacon.
Serve. Serve immediately and enjoy!