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Field Notes

Liquid Hand Soap

soap detergent
soap personal-care castile unprocessed
Mix 5 min
Yield 16 oz (one pump bottle)
Keeps 2–3 months
Storage room temperature
Notes Shake before use — oil and soap may separate

Ingredients

  • ¼ cup liquid castile soap (unscented)
  • 1¼ cups distilled or boiled water (cooled)
  • 1 tbsp vegetable glycerin
  • 1 tsp carrier oil (jojoba, sweet almond, or olive) — optional, adds moisture
  • 10–15 drops herbal infusion or essential oil — optional — see fragrance guide

Overview

This is the simplest recipe in the collection and a good one to start with. It’s essentially diluted castile soap with glycerin for moisture and a touch of oil to keep your hands from drying out. The consistency will be thinner than store-bought soap — that’s normal and expected. It still cleans just as well.

Instructions

  1. Add distilled water to a clean pump dispenser bottle first (this prevents foaming).

  2. Pour in the castile soap slowly.

  3. Add vegetable glycerin and carrier oil.

  4. If using fragrance, add your herbal infusion or essential oil drops now.

  5. Cap the bottle and gently swirl to combine. Don’t shake vigorously or you’ll get a bottle full of bubbles.

Tips

  • Thicker soap: Dissolve 1 tsp of coarse salt in the warm water before adding other ingredients. Salt thickens castile soap. Add it gradually — too much will make it gel.
  • Antibacterial boost: Use a tea tree or thyme herbal infusion as your water base.
  • Hard water areas: You may notice a slight film. Add ½ tsp more glycerin or switch to distilled water.
  • Container choice: Glass bottles are ideal if using essential oils, as some oils can degrade plastic over time.
  • Bathroom: Lavender or chamomile (calming)
  • Kitchen: Lemon balm or rosemary (fresh, cuts food odors)
  • Guest bath: Rose petal or lavender (welcoming)

Cost Breakdown

A 32 oz bottle of castile soap costs about $12–15 and makes roughly 16 bottles of hand soap. That’s under $1 per refill, including the glycerin and oil.