Preheat the oven to 400°F (200°C)
Rinse and dry the chestnuts
Cut an X into the flat side of each chestnut
Place the chestnuts on a baking sheet with the cut side up
Roast for 20 to 25 minutes
Remove from the oven
Wrap the chestnuts in a clean kitchen towel for 5 to 10 minutes
Peel the shells and inner skins while still warm
Serve immediately