The Best of French Dessert [customs_adv] The mille-feuille vanilla slice, custard slice, also known as the Napoleon, is a French pastry whose exact origin is unknown. Its modern form was influenced by improvements of Marie-Antoine Carême. Napoleon Previous Next 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 2017-06-01 admin Share ! tweet