Essential oil How to make your own Essential Oil. Steam Distillation (most common) Is the most popular and widely used method for extracting essential oils from plants like lavender, rosemary, or peppermint. What you will need: A distillation apparatus (or a DIY setup with a pot, lid, and tubing) Fresh or dried plant material (flowers, leaves, or stems) Water Heat source Condenser (if not part of your