Immerse the chestnuts in a bowl of water. Any that rise to the top are probably hollow or not good, so discard these.
Use a very sharp knife, place the chestnut flat side down, and make a cross in the chestnut shell. Make sure to cut through both layers of the nut outer.
Heat your air fryer to 200℃ or
Put the chestnuts into the air fryer and cook for 5-8 minutes. They are cooked when they pop open and are slightly charred on the edges of the outer skin.
Pop into a bowl with a tea towel over it, or into a paper bag and shell and eat immediately!
Chestnuts are much easier to shell when they are warm, so if you like, you can do them in batches so that you don't end up with cold, unpeeled chestnuts.
To mix it up, you can also serve with a sprinkle of salt or cinnamon. Alternatively peel and use in a cozy recipe.
Notes
Be sure to score the chestnuts well, no matter how you choose to cook them! This prevents them from turning into little explosions when the hot steam starts to build up under their shell.
OVEN : You can also roast chestnuts in the oven. Roast at 200C for 15 - 20minutes.
OPEN FIRE : Use a chestnut basket or pan to roast the chestnuts. Be careful of any exploding!
Add spices or salt: Sprinkle a little salt or cinnamon on to the chestnuts after roasting.