How to make your own herbal soap

DIY Herbal Soap Recipe



  • Digital scale: ingredients are measured by weight, not volume
  • Thermometer: to monitor temperatures
  • Immersion blender: for easier mixing
  • Container for lye solution: stainless steel or heavy-duty plastic (recycle #5)
  • Container for mixing soap: stainless steel, heavy-duty plastic, or heatproof glass
  • Gloves & goggles: to protect hands and eyes
  • Safety mask or respirator: to protect respiratory system
  • Spatulas & spoons: silicone or heatproof plastic
  • Soap mold: 2.5 lbs. soap mold, empty milk carton, or silicone molds

Important: Don’t use aluminum or non-stick equipment since those substances react negatively with lye.


This recipe yields around 2.5 lbs. of soap, or about 7 to 8 bars when using a loaf mold. 

  • 9.5 oz. distilled water (or cooled herbal infusion)
  • 3.85 oz. sodium hydroxide (lye)
  • 12 oz. organic olive oil
  • 7 oz. organic coconut oil
  • 4 oz. organic shea, cocoa, or kokum butter
  • 3.5 oz. organic sunflower or sweet almond oil
  • 1.5 oz. organic castor oil
  • organic herbs, flowers, or organic essential oils (optional)


If you’re a new to soap making, be sure to review the tips and tricks below before you get started.

  1. Put on your goggles, gloves, and mask.
  2. Weigh water (or herbal infusion) into stainless steel or heavy-duty plastic container.
  3. Weigh lye into a small cup.
  4. Slowly sprinkle lye into the water.
  5. Stir well until lye completely dissolves.
  6. Place lye solution in safe area and cool for 30 to 40 minutes, or until it’s about 100 to 115 degrees F.
  7. Melt coconut oil and butter over low heat, then combine with other oils.
  8. Cool combined oils until they’re around 95 to 115 degrees F.
  9. Pour cooled lye solution into warm oils.
  10. Use combination of hand stirring and short bursts of the immersion blender to mix oils and lye solution.
  11. Mix until soap reaches trace.
  12. Pour soap into mold.
  13. If you’d like, use spoon to texture the top of soap then decorate with flower petals such as cornflower, calendula, or rose.
  14. Cover soap lightly with piece of wax paper or parchment paper.
  15. Cover with towel or blanket to insulate.
  16. Allow to set for one to two days before removing from mold.
  17. Turn out soap on a piece of wax paper.
  18. Cut soap into bars.
  19. Space bars out on wax paper or coated cooling rack ensuring plenty of airflow between them.
  20. Rotate every few days allowing for an even cure.
  21. Cure in open air for 4 to 6 weeks before use.

Tips & Tricks

  • When mixing, your lye solution will get hot quickly, so be sure to handle with care.
  • Work outside, in front of an open window, or under an exhaust fan and avoid breathing in the momentarily strong fumes.
  • When combining your warmed oils and lye solution, don’t overuse the immersion blender or you’ll create excess air bubbles, and the soap will thicken too quickly.
  • When you’ve reached trace, the soap batter will have a consistency similar to thin pudding or warm custard. You can test for “trace” by drizzling a spoonful of the soap batter across its surface in the mixing bowl. It should leave a brief but noticeable mark, or tracing, before sinking back in. Trace usually takes anywhere from 3 to 10 minutes to reach, depending on ingredient temperatures and how often you use the immersion blender.
  • If you’re making soap when your house is cold, cover it with a few extra layers.
  • It’s okay to briefly peek at your soap every now and then. If you see a crack developing, that means it’s getting too hot and should be uncovered and moved to a cooler area.
  • After an hour or two after mixing, you’ll notice that the soap is getting darker in the middle and might look jelly-like in spots. This stage is called gel phase and is perfectly normal.
  • If your soap is still a bit soft when you turn it out of your mold wait a few days before cutting it into bars.

Customizing Your Recipe

There are several ways to incorporate herbs, flowers, and other nourishing ingredients into soap recipes. While some herbal constituents won’t survive the soap making process, others are surprisingly resistant to the alkaline conditions and heat.

Instead of plain distilled water, try using a chilled herbal tea in its place. It can be as simple as chamomile tea or hydrosol, or a complex blend of your favorite herbs. Take note that a strong dark tea will often yield soap with a brown hue, while some herbs, such as organic chlorella and wheatgrass, act as natural colorants.

Another way to enrich your soaps is to infuse all or part of the oils with skin soothing herbs, including organic calendula, organic chamomile, or organic plantain. Some herbs and flowers will add a subtle hint of color to your soap as well.

A third way to incorporate ingredients such as oatmeal, honey, essential oils, clay, or organic herbal powders is to blend them into the soap batter when you reach trace.

3 Ways to Customize

The following examples show how easy it is to create unique variations using the same simple soap recipe above, with the addition of just a few additives.


Make the soap as directed, adding 1 1/2 tsp. organic chamomile flower powder and 1 1/2 tsp. honey at trace.


Dilute the honey with an equal amount of warm water first to help it mix into the soap batter more readily.


Make the soap as directed, adding 1 Tbsp. french green clay and 24 grams organic peppermint essential oil at trace.

Dilute clay with 2 to 3 times the amount of water first to make sure it blends into the soap evenly.


Make the soap as directed, adding 1 1/2 tsp. organic chickweed powder and 1 Tbsp. ground oatmeal at trace.

Process rolled oats from the grocery store in a coffee grinder to form a fine oatmeal powder that’s perfect for soap making. Avoid using larger pieces as they can mold.

Essential oils like tea tree oil, peppermint oil, clove oil, etc give your soaps a scent. Choose the one you prefer!

If you cant purchase the powder but can get the flowers or herbs instead, use a pestle and mortar to grind it.Make sure the pestle and mortar is dry though.

Use toothpick to poke any bubbles that form in the soap before its hard.


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