The name of the chestnut cake that is popular in Tuscany is Castagnaccio. Castagnaccio is a simple, dense cake made with chestnut flour, olive oil, raisins, and pine nuts that is moistened and bound together with water and then baked. It is commonly flavored with a little rosemary, although some recipes call for chopped chocolate or candied orange instead. Castagnaccio is a traditional Tuscan dessert that is typically made in the late fall after the chestnut crop has been dried and made into flour.