Preheat the oven to 425°F (220°C)
Rinse and dry the chestnuts
Cut an X into the flat side of each chestnut
Place the chestnuts on a baking sheet, cut side up
Roast for 20 to 30 minutes
Remove from the oven when the shells peel back
Wrap the hot chestnuts in a clean kitchen towel for 5 to 10 minutes
Peel the shells and inner skins while still warm
Serve immediately