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This homemade peppermint and patchouli Castile soap recipe lends a fun twist to a basic Castile soap.

Homemade Peppermint & Patchouli Castile Soap Recipe

This homemade peppermint and patchouli Castile soap recipe lends a fun twist to a basic Castile soap.

This homemade peppermint and patchouli Castile soap recipe lends a fun twist to a basic Castile soap. Made using olive oil, this peppermint and patchouli Castile soap recipe also combines peppermint and patchouli essential oils for a fabulous unisex fragrance blend along with mineral rich Red Hawaiian Alaea Salt and a touch of Australian midnight black clay.

This homemade peppermint and patchouli Castile soap recipe lends a fun twist to a basic Castile soap.

Peppermint & Patchouli Castile Soap Recipe

© Rebecca’s Soap Delicatessen


36 oz. virgin olive oil

4.5 oz. sodium hydroxide/lye
11 fl. oz. distilled water

.5 oz. sodium lactate (60% solution)
1 Tablespoon Australian midnight black clay
2 Tablespoons Red Hawaiian Alaea Salt
1.5 oz. patchouli essential oil
.25 oz. peppermint essential oil (or .5 oz. peppermint fragrance oil)

Soap Notes:

water as % of oils = 30.5%
6% superfat
essential oils used at 4.8% of oil weight

This homemade peppermint and patchouli Castile soap recipe yields 10-12 bars of soap that will weigh around 4 oz. each depending on how they are cut and fits inside my DIY wooden loaf soap mold. Alternately, you can get nine 5.5 oz. round soaps using two Crafters Choice™ Basic Round Silicone Soap Molds or fifteen 3.3 oz. square soaps using three Tovolo King Silicone Ice Cube Trays.


You’ll need to follow my basic cold process soapmaking instructions for this homemade peppermint and patchouli Castile soap recipe.

(If you’ve never made cold process soap before here’s another good, inexpensive beginner’s cold process soap recipe. Or download my free beginner soapmaking ebook.) Be sure to take all proper safety precautions when working with lye including goggles and gloves.

Begin by measuring out the distilled water in fluid ounces. Pour into a heat safe pitcher. Next, using a digital scale weigh out the lye. Slowly pour the lye into the water in a well ventilated area and stir until all the lye has dissolved. Set aside to cool.

Now weigh out the olive oil using a digital scale and combine in a stainless steel pot. Heat until all the olive oil reaches around 95°F remove from heat. Prepare you essential oils by weighing them out into a glass Pyrex measuring cup and set aside.

When the lye-water has cooled to around 90°-95°F – you want the olive oil and lye-water to be about the same temperature – you’re ready to make soap.

Weigh out the sodium lactate and stir into the cooled lye-water.

Next, weigh and add the clay and salt to the olive oil. Mix with a stick blender until thoroughly combined.

Now slowly pour the lye-water into the olive oil/clay/salt mixture. Mix with a stick blender until you reach a light trace. Add the essential oils and combine with the stick blender until you reach a full trace.

Pour the soap into your prepared mold(s). Sprinkle with the red Hawaiian alaea salt if desired.

Level the top of the poured soap if needed. Leave uncovered so the soap doesn’t overheat or place in your refrigerator. Set aside for 48 hours.

After 48 hours your can unmold your peppermint and patchouli Castile soap. Unmold your soaps. If you made soap loaf and it’s hard enough, go ahead and cut it into bars when you unmold it. If it’s still a bit soft, wait an additional day then cut into bars.

Allow your homemade peppermint and patchouli Castile soaps to cure anywhere from 4 weeks to 6 months before use. The longer the cure the better the bar. Typically soaps created using a traditional Castile soap recipe are cured for 4 to 6 months for best results.

Once your Castile soaps have cured, wrap and label as desired. (Go here to learn how to make your own custom soap labels.)

For more of my homemade soap recipes as well as bath and beauty DIY’s be sure to visit Rebecca’s Soap Delicatessen. You can also follow me on Pinterest for collections of not only my homemade soap recipes and beauty DIY’s but also some of my favorites from around the web.

Keep track of all my new homemade soap recipes and other DIY creations by following Soap Deli News blog via Blog Lovin’ and Tumblr. You can also find me on Facebook, Twitter, G+ and Instagram.


  • kristen

    July 16, 2015 at 5:50 pm

    This looks like a beautiful and super easy recipe. I had no idea that peppermint and patchouli EOs would work well together. I itching to get into my soap lab aka kitchen now…:) all i need is black clay and I’m ready

  • John

    September 15, 2015 at 1:33 pm

    Hey, I’m curious about the australian midnight black clay. Do you know know if a 4oz container will yield 4 tablespoons – I want to try this recipe, and I want to double it. I’m looking at the link to the amazon product and it looks very expensive…

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