50g. Suitable for Vegan, Vegetarian, Lactose and Gluten Free Diets. Advise on using, the Tonka Bean should be used very sparingly. Depending on the recipe for milk-based desserts, it is recommended to boil the beans in milk for a few minutes or grate them down a little with a nutmeg grater. Can be used as substitute for vanilla, but should not be used as a whole substitute in sweet dishe. Tonka Beans sound like they are tough and mean beans, they are not. The almond shaped bean gives off a fragrance of almonds, vanilla and hay.