The No. 3 Bar has three ingredients. Not three categories of ingredients, not three active components alongside a list of carriers — three ingredients, total. Saponified avocado oil, saponified coconut oil, and saponified olive oil.
Each one is in the formula because it does something the other two do not do as well. Here is what each oil contributes — and how the three work as a system.
Avocado Oil
Avocado oil is one of the more unusual base oils in soapmaking — unusual because most manufacturers skip it. It is more expensive than the standard options and produces a bar that looks identical to a bar made without it. The benefit is in the fatty acid profile, not the appearance.
Avocado oil is high in oleic acid — a monounsaturated fatty acid that is compatible with the skin's own lipid structure. It also contains vitamins A, D, E, and K, and a notable percentage of palmitoleic acid, which is found naturally in skin and declines with age. In soap, avocado oil contributes a rich, conditioning quality to the lather. The bar does not feel stripping after rinsing. Skin feels clean without feeling tight.
Avocado oil produces a soft soap on its own and contributes relatively little to lather. That is why it is used in combination with coconut oil rather than as a primary base.
Coconut Oil
Coconut oil is the engine of the bar. It is high in lauric acid — a saturated fatty acid that saponifies into a highly effective cleanser and produces abundant, persistent lather. Without coconut oil, a natural soap bar can feel like it does not quite clean. With it, the lather is immediate and the cleansing is effective.
The trade-off with coconut oil is well-documented in soapmaking: too much of it strips skin. A bar made predominantly from coconut oil will cleanse aggressively — so aggressively that it can leave skin feeling dry and tight, especially in people with sensitive or dry skin. The solution is ratio. Coconut oil should be present in enough quantity to do its job — cleanse and lather — and no more. The conditioning oils balance what coconut oil takes.
In the No. 3 Bar, coconut oil provides the cleanse. Avocado and olive oil restore what the cleanse takes.
Olive Oil
Olive oil has been used in soapmaking for thousands of years — Castile soap, one of the oldest soap traditions in the world, is made primarily from olive oil. The reason it has endured is practical: olive oil saponifies into a gentle, conditioning bar with a mild lather and excellent longevity.
Olive oil is high in oleic acid, like avocado, which makes it compatible with skin's natural lipids. It contributes conditioning without leaving a film. It extends the working life of the bar — high-olive bars are typically harder and last longer than bars made primarily from softer oils. It also mutes the aggressiveness of the coconut oil cleanse, balancing the formula toward gentleness.
Olive oil takes longer to saponify than most oils, which is why cold-process bars made with high olive oil content require a longer curing period. The wait is worth it. The bar is harder, smoother, and more conditioning than a bar cured quickly from faster-saponifying oils.
How They Work Together
The three oils cover what soap needs to do. Coconut oil handles cleansing and lather. Olive and avocado oil handle conditioning. The ratio is calibrated so that the coconut oil's aggressiveness is balanced by the conditioning oils — leaving skin clean without stripping it.
The result is a bar that does not require fragrance to be appealing, does not require synthetic additives to perform, and does not require a twenty-ingredient list to justify its existence. Three oils, each doing its job.