Add the macadamia oil, rosehip oil, squalane, vitamin E, and essential oils into a small glass beaker.
Stir until everything is well combined. Vitamin E has a dense consistency and may take a few moments to dissolve. The serum is ready when you can no longer see streaks of individual ingredients.
Transfer the face serum to a glass dropper bottle.
Store airtight, away from direct sunlight and heat.