The Chestnut Old Fashioned is a unique and flavorful cocktail that showcases one of Corsica's most famous ingredients – chestnuts. This cocktail is made by muddling sugar and bitters in a glass, then adding chestnut liqueur and a splash of water. Stir well and add ice cubes. Garnish with an orange twist for a citrusy aroma. The chestnut liqueur adds a nutty and slightly sweet flavor to the classic Old Fashioned cocktail, making it a perfect choice for those looking to try something different in Corsica.