Scrub potatoes and cut in chunks. It’s not necessary to peel them.
Place potatoes in a large plastic bag and add the olive oil. Squish the bag so the potatoes are all coated with the oil. Add the ranch mix and squish the bag again so they’re coated with the seasoning.
Place in the fryer basket and air fry at 400F/200C for 20 minutes, shaking basket half way through the cooking time.