Melt the coconut oil in a double boiler or in the microwave.
In a separate bowl, mix the baking soda and arrowroot powder.
Add the melted coconut oil to the dry ingredients and stir until well combined.
Add 10-15 drops of essential oils, if desired.
Pour the mixture into a container or mold and let it cool and harden.
To use, scoop out a small amount and apply to clean, dry underarms.
