Preheat the air fryer to 400F / 200c.
Lay a large piece of foil on your counter top. Pierce each potato with a fork two or three times and place in the middle of the foil.
Once the air fryer is preheated, lift the foil and potatoes into the basket. Drizzle over the oil, add a little salt and fold the foil over the top so that the potatoes are covered.
Cook the potatoes at 400F for 30 minutes til fork tender (times may vary slightly depending on how large your potatoes are).
While the potatoes are cooking, add the butter, cream, salt and black pepper to a medium sized pot and heat on a low heat on the stovetop to melt the butter.
Once the potatoes are cooked, place them into the pot with the butter and cream and mash together til smooth.
Add a little more cream if the potatoes are too stiff. Taste and season with additional salt if needed.
Stir in the chopped chives and serve.