Herbal Soap Balls 1/4 cup Boiling water 1 Tablespoon Pulverized herbs (Chamomile, Lavender, Peppermint, Rosemary, Sage, or Thyme - combination) 5 Drops related essential oils 2 cups Ivory or castille soap - grated Plastic wrap Pour boiling water over herbs. Add 5 to 6 drops oil. Steep 15 minutes. Reheat til bubbly and pour over soap. Mix well with hands and let stand 15 minutes. Mix again and divide into 3 or 6 parts, rolling each into a ball. Place on plastic wrap and dry for 3 days.