Combine all ingredients in a mixing bowl and mix together with a spoon.
Store in an air tight container. Optionally tie a bow of twine around the rim of the jar.
Expert Tips & FAQs
If you are using an 8 oz container as linked above, you may have about 1/4 cup extra milk bath. You can either use a larger jar for storage or you can seal the extra in a Ziploc bag.
The shelf life of this lavender milk bath should be close to a year. However, keep in mind that the lavender essential oil will not be as potent the longer it sits. This milk bath is typically used fairly quickly, however, a good rule of thumb is to go off of the powdered milk expiration date.
Serving size per bath is normally 1/2 cup, but feel free to use as much or as little as you'd like.