We use all natural, mainly liquid flavorings. We stir the flavorings into the oil or balsamic just prior to bottling and everything is also made to order for maximum freshness. No heat is used in the process. The EVOO uses EVOO based flavorings, the balsamic uses alcohol extract-based flavorings. Some product use dry spices which are blended in with an immersion blender. There are many complicated flavors and recipes. Feel free to call with questions on specific products. Flavorings are all-natural and vegan (plant based), many, not all, are organic.