I have used this and it works.
3 tbsp virgin coconut oil 2 tbsp shea butter 3 tbsp baking soda 2 tbsp cornstarch 5 drops essential oil (lavender, orange, etc.)Make a double boiler by placing a half-pint glass jar in the middle of a small pot of water. Bring water to a simmer. Add coconut oil and shea butter to the jar and let melt. Turn off the heat, add baking soda and cornstarch, and stir until completely smooth. Mix in the essential oil of your choice. Let cool.
Thank you Mogie! Can't wait to try it.
google your question and you will get a variety of answers.
This might be of interest Rebecca