This cold processed soap base recipe and ingredients is a good simple foundation to begin your soap making journey. It only requires two oils, coconut and olive oil. Having a good base recipe will allow you to perfect your skills and also gives you something to build on. Once you have a solid base, the possibilities are endless when it comes to colors, fragrances and techniques.

block of base recipe soap
Base Recipe Soap Bar

Lye Calculator for Soap Recipes

Whenever you are working with lye, you want to run your recipe through a soap calculator just to make sure the lye amount is correct for your mold. This is the silicone mold I use.

If the lye amount is incorrect, the soap will not come out right. You can find out the size of your mold by placing it on your scale, zeroing the scale, and filling it with water for the weight.

Also if you want to substitute any of the oils you will need to re-run the recipe as different oils have different properties that affect the lye amount. has a lye calculator you can use.

silicone loaf mold
Silicone Loaf Mold


I always choose the best ingredients I can find. The better your ingredients, the better the soap. I avoid any additives or chemicals, I also try to by organic whenever possible.

Coconut Oil

I like to find coconut oil at bulk warehouses, this one is from Sam’s Club. I like the fact that it is organic and it was a good price.

Organic Coconut Oil

Olive Oil

This olive oil is from Costco. You need a pretty good amount of olive oil for this recipe. Costco sells these as a pair which is nice!

Sodium Hydroxide (Lye)

I ordered my Lye off of Amazon. It states it is 100% food grade. However, as long as the ingredients say 100% sodium hydroxide, you should be good to go to use it. Never use sodium hydroxide with any additives. It is also called Lye and caustic soda. Remember to have your safety gear ready to use.

cold processed soap sodium hydroxide
Sodium Hydroxide


We have a well here on the farm, so I use well water for my soap and have not had any trouble. However, if your water is from a public utility and you are unsure if there are any additives, it is recommended to use distilled water from the grocery store.


You will also need 1 tsp of salt, this is added to the water before the Lye is added. Salt helps the soap come out of the silicone mold easier. Some people also claim it helps the bars cure faster and become firmer. I used pink Himalayan salt from Costco.

Soap Supplies

And of course you will need all of your soap supplies, you can see my previous post that lists all of the supplies I use. I also have a free PDF soap supply list available. You can find a link on the bottom of this post.

Cold Processed Soap Base Recipe

  • 652 g Olive Oil (82%)
  • 142 g Coconut Oil (18%)
  • 108 g Sodium Hydroxide
  • 227 g Distilled Water
  • 1 tsp salt


I plan on making another post describing the process of how I make cold processed soap at home. However, if you do choose to make this soap, please follow all the necessary safety precautions. There are a lot of good tutorials available on how to make cold processed soap at home.

Let me know how your soap turns out! Tag me on Instagram @xoxotinadesign

Thanks for reading!

xoxo, Tina

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