The first step is to set up a double boiler or create one by adding a pot filled about half way with water and place a glass or heat safe bowl on top.
Next, add all of the ingredients except for the essential oils to the glass bowl and heat the water to a boiling.
Mix the ingredients well while they are warming up. Once they are completely incorporated, very carefully remove from heat. Stir in essential oils if using them.
Using potholders, pour the liquid into tins or a small glass mason jar.
Allow to cool completely and place a lid on for storage.