Cut a small X in the flat side of each nut using the point of a paring knife.
Place the chestnuts in a saucepan with enough water to cover. Bring to a boil, reduce the heat, and simmer for 15 to 30 minutes, or until soft inside. Be careful not to overcook the chestnuts. Peel one and check the inside; it should be dry and have a mealy texture, something l