Soak chestnuts in cold water for approx. 1 hour. Then make thin crosswise incisions on one side with a small knife.
Spread the chestnuts on the grill cup and bake at 170 °C for approx. 25-30 minutes, shaking occasionally.
During the baking process, pour approx. 80 ml of water into the bottom of the Philips Airfryer to prevent the chestnuts from drying out.