1 (18-ounce) foaming hand soap dispenser, empty
2 ounces Dr. Bronner's liquid soap, any fragrance (about 1/4 cup; I use peppermint)
2 to 3 tablespoons witch hazel
5 drops essential oil, fragrance of your choice (I use eucalyptus)
Fill your foaming dispenser about 1/8 full of Dr. Bronner's liquid soap. Add witch hazel and essential oil, then fill with water (leave room, about 1-1/2 inches, at the top so it will foam properly). Shake to combine.
Source of recipe: Modified from a hand soap recipe I found online.