Cupuaçu butter, refined in soap making
Published by The Soap Brain Team
Values can vary for this oil. The numbers below range quite a bit from one supplier or batch to the next, so we can't pin them to one exact figure. Treat them as a solid starting point — check your supplier's spec sheet, and make a small test batch before a big one.
Cupuaçu butter, refined is a hardening soap-making oil rich in oleic acid (38.8%). A gram of it turns to soap with about 0.135 g of NaOH (lye). It firms up a bar with a stable, creamy lather and blends well with conditioning oils. Most soapers use it at 5–10% of their oils.
Fatty-acid profile
Cupuaçu butter, refined is mainly a hardening oil: its saturated fatty acids give a firm, long-lasting bar with a stable, creamy lather, and it is usually blended with more conditioning oils to keep the finished soap mild.
Cupuaçu butter, refined is about 50% saturated fat and 41% unsaturated — that saturated majority is what lets it firm up a bar and hold a stable lather.
| Fatty acid | Share | What it does in soap |
|---|---|---|
| Oleic acid | 38.8% | a monounsaturated fatty acid that makes a gentle, conditioning, moisturising bar with a slick, lower lather and a slower trace |
| Stearic acid | 38% | a saturated fatty acid that adds hardness and a thick, stable lather; a large share can speed up trace |
| Palmitic acid | 11.5% | a saturated fatty acid that builds a hard, long-lasting bar with a stable, creamy lather |
| Linoleic acid | 2.4% | a polyunsaturated fatty acid that is very conditioning but oxidises readily — a driver of DOS (dreaded orange spots) at high levels |
Cupuaçu butter, refined in the bar
Expect a dense, low-bubble, creamy lather from Cupuaçu butter, refined — rich and steady rather than foamy. Pairing it with a bubbly oil adds the fluffy bubbles it lacks.
Because it is rich in palmitic and stearic acids, Cupuaçu butter, refined tends to bring a batch to trace quickly and set up fast, so work briskly and keep fragrances that accelerate trace in mind. The upside is a firm bar that usually unmoulds within a day or two.
In a blend Cupuaçu butter, refined is a hardening, bar-firming component. Use it in small amounts; combine it with conditioning liquid oils so the bar stays mild rather than brittle.
Closest substitutes for Cupuaçu butter, refined
Out of Cupuaçu butter, refined? These oils behave most like it in a bar — ranked by how close their hardness, cleansing and conditioning profile and lye (SAP) requirement are. The numbers are predicted properties for a 100% single-oil bar, not a safety guide; always recalculate the lye when you swap an oil.
| Oil | Hardness | Cleansing | Conditioning | SAP (NaOH) |
|---|---|---|---|---|
| Cupuaçu butter, refined (this oil) | 50 | 0 | 41 | 0.135 |
| Cupuaçu butter, deodorized | 50 | 0 | 41 | 0.135 |
| Sal butter | 51 | 0 | 40 | 0.132 |
| Tallow (beef fat) | 52 | 3 | 46 | 0.138 |
| Mango butter | 48 | 0 | 49 | 0.136 |
Using Cupuaçu butter, refined in a recipe
One gram of Cupuaçu butter, refined needs about 0.135 g of NaOH (sodium hydroxide) to turn fully to soap, within a documented range of 0.128–0.143 g/g across sources. The calculator below uses this value; always confirm the lye weight before you mix.
Its iodine value is about 45 — a low value, pointing to a hard, long-lasting bar with good shelf life. Iodine value is only a rough guide, not a hard rule, but it gives you a feel for how a bar built around this oil will wear.
Most soapers use Cupuaçu butter, refined at roughly 5–10% of their oils.
Maker's note: The refined grade of the same butter — refining changes odour, colour and melt point, not the fatty acids, so it takes the same lye per gram as the deodorized grade. Some charts list it higher; if you hold a certificate of analysis for your tin, enter its SAP — that beats any estimate.
Calculate lye for Cupuaçu butter, refined
The calculator below is pre-loaded with Cupuaçu butter, refined. Enter your weights, add other oils, and it works out the exact NaOH (lye) weight, water and quality numbers. Always weigh lye, oils and water — never measure by volume, wear gloves and eye protection, and add lye to water (never the reverse).
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Where these numbers come from
Every figure on this page is backed by at least two independent references, listed below — so you can check our work instead of taking our word for it.
- From Nature With Love — Saponification Chart — the CONTRADICTED figure: prints "Cupuacu Butter, Refined | 210 - 235 | 0.159 | 0.223" (and an identical "Ultra Refined" row) against a deodorized row of 180–200 / 0.135. Cited so the disagreement is visible, not because we follow it
- Formula Botanica — 5 Amazonian Butters — SAP 180–190, iodine 40–50 — for cupuaçu butter with no grade distinction
- Botanical Formulations — Cupuaçu monograph (reproducing Cohen & Jackix 2005, EMBRAPA) — fatty-acid profile: palmitic 11.22–11.70, stearic 37.86–38.15, oleic 37.83–39.79, arachidic 7.44–7.97, linoleic 2.37–2.47. Its SAP 210–235 and iodine 74.2 are NOT used — uncited, copied from FNWL, and refuted by this page's own profile
- Orbital: The Electronic Journal of Chemistry (UFMS) — fatty acids in Theobroma grandiflorum seeds — peer-reviewed GC-FID, nine acids detected: oleic 40.0, stearic 32.7, arachidic 10.4, palmitic 8.0 (the other five are unnamed in the abstract)
- Foods (MDPI) 2022 — cupuassu review (PMC9778104) — independent peer-reviewed lineage: oleic 36.3–42.2, stearic 29.2–32.9, arachidic 9.8–11.2, palmitic 7.3–7.8; arachidic "10 times higher" than cocoa butter. Prints no SAP
SAP data last updated · 51 oils covered.
Cupuaçu butter, refined soap FAQ
- Can you make soap with 100% Cupuaçu butter, refined?
- It is not recommended. Cupuaçu butter, refined shows its best in a blend, usually up to about 10% of the oils. On its own the bar would be unbalanced — too soft or low-lathering for everyday use.
- What superfat should I use with Cupuaçu butter, refined?
- A 5% superfat is a safe, common starting point for recipes using Cupuaçu butter, refined; adjust to taste once you know how the finished bar feels. Never drop to 0% or below without a deliberate reason — the calculator will ask you to confirm it.
- Does Cupuaçu butter, refined speed up or slow down trace?
- Because it is rich in palmitic and stearic acids, Cupuaçu butter, refined tends to bring a batch to trace quickly and set up fast, so work briskly and keep fragrances that accelerate trace in mind. The upside is a firm bar that usually unmoulds within a day or two.