If you’ve ever found a bottle of old oil at the back of your soap shelf and thought, “Can I still use this?”, this class is for you.
In Soaping with Rancid and Expired Oils, I take a hands-on look at what happens when you make soap using oils that have gone bad — intentionally. This lesson builds directly on the techniques and recipes taught in my Salting Out Handmade Soap Tutorial, so you’ll need to complete that class first.
Here’s what you’ll learn:
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How rancid oils affect soap performance, appearance, and smell
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When rebatching or salting out can actually save a batch
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What happens in the lye reaction when oils are past their prime
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How to identify oxidation before it ruins your batch
- How to make floating soaps!
👉 Important: This course is meant as a supplement to the Salting Out Handmade Soap Tutorial. You’ll need those foundational techniques to get full use out of the materials and experiments in this class.
As of 2026: If you’ve purchased the Rebatching Masterclass Bundle, this class is already included as a bonus extension.
Ready to see the real-world results of soaping with rancid oils? Let’s find out together — no myths, no guesswork, just good soapy science.
Happy soaping.
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