The Soapmaker's Companion

The most thorough single volume on soap formulation available. Cavitch explains the chemistry of saponification in accessible language, teaches you how to calculate your own lye ratios, and walks through the properties that different oils contribute to a finished bar.

Why Start Here

If you want to understand the science behind soapmaking rather than just follow recipes, this is your book. Cavitch covers over 40 recipes organized by type: basic bars, cream soaps, vegetable-based soaps, transparent soaps, and liquid soaps. More importantly, she teaches the principles behind formulation so you can eventually design bars from scratch.

At 281 pages, it goes significantly deeper than most introductory books. The trade-off is that the presentation is more text-heavy and less visually guided than Anne-Marie Faiola’s books. For some learners this is preferable, for others it makes the first batch feel more daunting.

What to Expect

A comprehensive, science-forward guide covering formulation, chemistry, and over 40 recipes across multiple soap types. Best suited for readers who prefer understanding the theory before starting, or as a second book after gaining basic experience.