A simple way to make cold-infused lavender oil using a liquid carrier oil and lavender flowers. This is a folk-method recipe and gives you lavender-infused oil that you can use to make salves, bath oil, handmade soap, and many other skincare recipes.
Loosely fill a clean jar with lavender anywhere from halfway to all the way. You can use lavender buds or whole flower heads.
If you use fresh lavender, weigh it down with a preserving weight. Do not allow any flowers to float to the surface.
Fill the jar to within an inch of the top with a carrier oil of your choice.
Seal the jar with a lid and place it in a warm but dim-to-dark place for a month. If you're not using a preserving weight, you can shake the jar occasionally, but it's not necessary.
After that time has passed, strain the oil from the lavender flowers using cheesecloth and/or a sieve. Discard the flowers and pour the oil into dark glass bottles for storage.