Are grain de vanille épuisés vegan?

"Grain de vanille épuisés" is a term used in French cuisine to refer to spent vanilla beans that have already been used to infuse flavor into a dish. These beans are characterized by their dry and brittle texture, and a lack of the moist, plump appearance of fresh vanilla pods. Despite their depleted flavor profile, spent vanilla beans can still be used in cooking to add a subtle hint of vanilla aroma and flavor to dishes. They are often utilized in baking recipes, such as homemade vanilla extract or vanilla sugar, to extract the remaining essence from the bean. The use of "grain de vanille épuisés" offers a frugal and sustainable way to extract as much flavor as possible from this precious and expensive ingredient.