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An Expert's Guide to Making Cold Process Soap at Home

Cold Process Soap Making : Making a cold process soap at home is not an as easy task as it sounds. And most importantly, there are a few factors that should be considered before formulating cold process soap. A perfect soap bar can only be yours if you put forward your best efforts. Today, homemade soaps can be very easily curated with skin nourishing and natural ingredients your skin needs and deserves.

So, if you want to customize a soap of your own at home, then here's our guide of cold process soap making at home. 

What is Cold Process Soap? 

Cold process soaps are generally saponified at room temperature that is curated using no warming or rinsing properties. Oils can sometimes be slightly warmed to achieve a homogenous mixture. Moreover, cold process soap making is quite a long procedure. One of the main benefits of cold process soap making is having entire control over the ingredients. 

Cold Process Soap Making

Equipment Required to Make Cold Process Soap

The different sets of types of equipment required of cold process soap making at home are the following: 

  • Digital Scale 
  • Infrared Thermometer/Digital Thermometer
  • Immersion Blender 
  • Stainless steel pan for melting solid oils
  • Large bowl for measuring liquid oils 
  • Small sieve (strainer) 
  • Heatproof jug for the lye solution
  • Rubber spatula for scraping and stirring 
  • Empty milk or juice carton 

Ingredients Required for Cold Process Soap Recipe

The ingredients required for the cold process soap recipe are the following: 

How to Make Cold Process Soap at Home? 

Here's how you can make cold process soap at home by following these simple and easy steps: 

  • Set up your desk with the necessary tools and supplies. Put on an apron or any cover cloth, rubber gloves, and eye protection. Pre-measure the components with great care. Put the liquid oils in a jug, the water in another heat-resistant jug, the solid oils in a pan, and the lye in a different container.
  • Get your recycled soap mold ready. An empty beverage carton should be cleaned and dried upside down. Cut out the side with the pouring spout when it is completely dried. Block the carton's open end by inserting a piece of the material that was cut out. This makes it easier to produce a flat surface on that side of the mold than a strange form derived from the contour of the carton's top.
  • Now, dissolve the lye crystals in water. Pour the lye crystals into the water and stir it well. Leave it aside in a shallow basin of water to cool. Then melt the solid oils in a stainless steel pan on low heat. Now pour the melted liquid oils. 
  • Once done, measure the temperature of both lye-water and the oils. Try to maintain the temperature at about 95-100 degrees. Then pour the lye solution into the pan of oils. Dip your immersion blender into the pan, and then stir the mixture. Then bring it to the center of the pan with both of your hands. Turn it off, and then stir the soap batter using the blender as a spoon. Repeat the process until the mixture thickens up to the trace. 
  • Now, quickly pour the soap into the mold. Give it a tap, and then settle it. Then put it in the refrigerator and leave it there overnight. You can also leave the soap solution sitting idle on the counter during this time. The next day takes the soap out of the fridge and lets it for another day. 
  • Let the soap cross 48 hours of refrigeration and bring it out of the mold. Cut it into the bars using a kitchen knife. You can get about 6-8 decent-sized soap bars from this batter. These soaps have a shelf life of about two years.  

Difference Between Cold Process Soap and Hot Process Soap 

Just like hot process soap, cold process soaps are made with oils and lye. In cold process soap, you combine the lye with the water. Cold process soaps go through the gel phase and sometimes avoid the gel phase. On the other hand, hot process soap batter is thick and lumpy and hardens into a bar. While cold process soap heats from the inside out, hot process soap heats from the outside in.

Unlike cold process soap which usually lasts for 4-6 weeks, hot process soap can be easily used immediately after it hardens. Additionally, the essential oils are added to hot process soaps after the gel phase in cold process soap. Both cold process and hot process soaps have their own set of pros and cons. It's a matter of personal preference when choosing anyone. 


Even the world's best soap makers use the cold process method to make soaps. So if you are into soap making and wish to make soap yourself at home, then this is your time to go and implement this recipe. You can visit VedaOils USA for the quality soap making products and its recipe. After all, it is a time-tested technique and helps you enjoy a self-made soap that suits your skin and does not contain any harsh chemicals. Follow this step-by-step guide and make your own cold process soap at home. 


Q: Is the cold soap process better? 

A. Yes, cold process soap is better because it typically yields a long-lasting soap bar. Moreover, they are better for the environment and for the skin too. 

Q: Which are the oils that are best for cold process soap? 

A. The best oils for cold process soap are olive oil and coconut oil. Other oil options can be too sticky and hard. 

Q: How long does it take to harden a cold process soap?

A. Cold process soap requires patience and takes around 4-6 weeks or more days to harden in the mold.

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