Soufflé Chestnuts

Name: Soufflé Chestnuts (Marrons en soufflé)
Prep time: 30 min
Cook time: 14 min
Total time: 44 min
Yield: For four people
Cuisine: French
Ingredients: butter and flour (for the soufflé dish); butter and flour (for the soufflé dish); 300 g (10½ oz) chestnuts; salt; 3 egg yolks; 5 egg whites; 2 tablespoons double cream; 1 teaspoon sugar; 200 ml (⅓ pint) milk