Select preset program of Preheat to preheat the air fryer.
Slice potatoes crosswise into 1/8-inch slices, leaving a 1/4-inch at the bottom of each potato intact. Repeat with remaining potatoes.
Combine butter and oil in a small bowl.
Brush butter mixture evenly over potatoes and in between slices.
Place potatoes into the air fryer and select French Chips program and set the time to 40 minutes, then press Start/Stop to cook until potatoes are tender.
Top potatoes with cheddar cheese, sour cream, bacon and green onions.
Tip: Stack on your favorite toppings, like chili, jalapeno, avocado and more!