Uploaded July 2021 | Updated September 2026, 20 hours ago

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In this video I show you how I make a simple cold process olive oil / castile soap with added carrots. Olive oil makes a very mild & gentle soap that’s suitable for sensitive skin. Carrot puree gives the soap a natural yellow color.

Remember to wear proper safety equipment when making soap. Gloves and eye protection are required.

○ Cold process castile soap recipe with carrot puree:

Total batch weight: ~860 g

600 g olive oil (100%)

100 g distilled water
70 g cooked and pureed carrots

10 g citric acid

83.2 g lye (77.2 g if not using citric acid)

(31.2% lye concentration(including the carrots), 5% superfat)

8.4 g lemongrass essential oil
3.6 g ginger essential oil

Cure the soap for at least 4 weeks before using it on your skin. Castile soap benefits from a longer, 3-12 month cure.

○ Citric acid information

When citric acid and lye (NaOH) are combined, sodium citrate is created. Sodium citrate works as a chelator in soap.

A chelator traps metal ions such as calcium and magnesium that can be found in tap water.

These metal contaminants can cause rancidity and soap scum in handmade soap.

A chelator binds to these metals so that they can’t bind to the soap molecules. This way the soap won’t react with them and the soap's lather improves + shelf life increases.

Citric acid does not lower the pH of soap. Instead it consumes some of the lye and increases the superfat. Add 6 g extra lye for every 10 g of citric acid added to a soap recipe if you want to keep the superfat % at the same level.

How much citric acid should be added to soap?

Usage rate in bar soap is 1-2% of the oil weight.

How to use citric acid

Add citric acid to the distilled water and dissolve completely before adding the lye.

Soap making equipment*

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