Avocado oil is extracted for its healthy fats and it lovely avocado flavor. Typically, the process starts by grinding up the avocados and pressing out their tough flesh which is then added to a mixture of water and lye. This makes a typical old-school soap base, also known as cacoa butter. After cooling down, this mix can be mixed with lighter oils like olive or grape seed oil to make an emollient you can spread on your skin.