Wash, scrub and pat dry the potatoes with paper towels.
Poke the potatoes all over with a fork, then rub them with oil and sprinkle with salt.
Arrange the potatoes in the basket of the air fryer and cook at 400 degrees F for 40 minutes.
After that, arrange on a large baking sheet, and let them cool until cool enough to handle.
Cutting lengthwise, and scoop the inside out of each potato leaving a ½” border.
Place the insides in a large bowl and add butter, milk, and sour cream. Mix until mostly smooth, but with some small chunks.
Add 1 cup of cheese and green onions and stir until incorporated. Season with salt and pepper.
Fill in the baked potatoes with potato mixture and place them in the basket of the air fryer.
Top with the remaining 1/2 cup of cheddar cheese.
Cook at 400 degrees F until the cheese is melted, for 4-5 minutes.
Garnish with more green onions before serving.