Peel and cut the 500 g potatoes into smaller pieces.Boil them until tender in salted water for about 15 minutes.
Preheat the air fryer to 180°C.(Preprogram, or let it run for a couple of minutes before cooking)
Mash the potatoes in a bowl together with 50 g butter, 2 dl milk, 1 tsp salt, 1/2 tsp black pepper and 1/4 tsp nutmeg, until it forms a smooth mixture.
Add the 3 pcs egg yolks and 50 g grated cheese to the potato mixture and stir well.
Whisk the 3 pcs egg whites until stiff in a clean bowl.
Gently fold the whisked egg whites into the potato mixture a little at a time to preserve the air in the soufflé.
Grease the moulds with 1 tbsp Butter and distribute the soufflé mixture among them, filling them about 3/4 full.
Place the moulds in the air fryer and bake for 15-18 minutes, until the soufflés are risen and golden.Start the online kitchen timer here
Notes
- Avoid opening the air fryer during baking, as the soufflés may collapse.- Serve the soufflés immediately, as they will begin to collapse as they cool.