1/4 cup baking soda
1/4 cup arrowroot powder (some people sub corn starch)
1/3 cup coconut oil
essential oils - I use tea tree and peppermint
Mix the two dry ingredients well, making sure to take out any lumps. Cut in the coconut oil until the powders are pretty well coated. Use 3-5 drops of each essential oil as desired for scent (I'm not sure if any other properties are useful in that small quantity). Mix thoroughly. I find this amount just fits into a little 4 oz glass jar. I still need to tweak, see if I need more (likely) or less dry ingredient to coconut oil.