What Is Cacao Butter? The Fat Inside The Bean

Cacao butter is the fat that comes out of the cacao bean, and nothing else. British law defines it as "the fat obtained from cocoa beans or parts of cocoa beans" with a free fatty acid content of no more than 1.75%, expressed as oleic acid. Cacao butter and cocoa butter are the same material; the spelling is a marketing choice, not a different ingredient.

What makes it worth a page of its own is that this fat is unusually narrow. Most natural fats melt across a wide, soft range. Cacao butter does almost all of its melting in a few degrees, which is why a chocolate button can be solid in your hand and liquid in your mouth, and why the whole craft of tempering exists.

What cacao butter is made of

Lipp and Anklam surveyed the compositional literature on cocoa butter for Food Chemistry in 1998, pulling together data by country of origin. Across those origins the fatty acid profile sits in a tight band.

Fatty acid	Typical share of cocoa butter
Stearic	about 33-38%
Oleic	about 33-37%
Palmitic	about 24-26%
Linoleic	about 2.6-3.5%

Those four do not float about independently. They are arranged into triglycerides, and three arrangements dominate: POS at roughly 35-38%, SOS at 24-28% and POP at 14-16%, where P, O and S stand for palmitic, oleic and stearic in position order. Three molecules doing most of the work is the reason the melting behaviour is so sharp. A fat built from fifteen competing triglycerides cannot do that.

The same survey found the profile shifts by origin, with African butters generally lower in oleic acid than South American ones. That is a compositional observation, not a quality ranking, and it is one reason origin shows up in texture as well as in flavour. Our note on how single-origin cacao is described by flavour goes further into the sensory side.

Six crystal forms, and why chocolate makers chase one

Cacao butter is polymorphic: the same fat can set into six different crystal structures, each with its own melting point. Lonchampt and Hartel reviewed the fat bloom literature in the European Journal of Lipid Science and Technology in 2004 and tabulated the figures. Taking the Davis and Dimick values they reproduce:

Form	Melting point
I	13.1 °C
II	17.1 °C
III	22.4 °C
IV	26.4 °C
V	30.7 °C
VI	33.8 °C

Form V is the one chocolate makers want. Tempering is the process of cooling molten chocolate in a way that seeds form V crystals specifically, so the set chocolate snaps rather than crumbles and releases cleanly from a mould. Lonchampt and Hartel describe the cooling step as inducing nuclei in the form V state.

Form VI is what happens next if you let it. The review states that bloom during storage "is always accompanied with a polymorphic transition of cocoa butter from the bV to bVI form". That grey-white film on a forgotten bar is not mould and not sugar. It is the fat having found a more stable arrangement at your room temperature.

Why cacao butter gets taken out and replaced

Here is the tension in the category. Cacao butter can be separated from the bean and traded on its own, which is exactly what pressing is for. Press the fat out, sell it into another market, and what remains is cocoa powder.

Schedule 1 of the Cocoa and Chocolate Products (England) Regulations 2003 is where this becomes visible. "Chocolate" requires at least 35% total dry cocoa solids including at least 18% cocoa butter. "Chocolate couverture" requires at least 31% cocoa butter. Meanwhile cocoa powder needs only 20% cocoa butter on a dry matter basis, and fat-reduced cocoa is defined as anything below that. The law sets floors precisely because the fat is the first thing to go.

Products sitting below those floors cannot use the reserved description and are sold as something else, which is where terms like "chocolate flavoured coating" come from. If you see a hard vegetable fat high in an ingredients list of a product calling itself chocolate, that is the substitution in progress. The same logic applies when a powder is de-fatted before being sold on, which we cover in the difference between whole cacao and de-fatted cocoa powder.

Cacao butter, cocoa butter and cacao paste

Name	What it is
Cacao butter / cocoa butter	The fat alone, pressed or separated from the bean
Cacao paste / cocoa mass / cocoa liquor	The whole ground bean, fat still in it, no sugar
Cocoa powder	What remains after the fat is pressed out; at least 20% cocoa butter by law
Fat-reduced cocoa	Below 20% cocoa butter on dry matter

Nothing in that table is about quality. It is about where the fat ended up.

What's actually in a Chaski tube

Chaski is a 600 g tube of dark chocolate buttons at 77% cacao. The ingredients list has no separate cacao butter line, because no cacao butter is added: the fat in a button is the fat that came with the single-origin Peruvian and Ecuadorian beans it was ground from. The rest of the list is coconut sugar, Lion's Mane as a fruiting body extract and Cordyceps sinensis mycelium.

The cacao is low-temperature ground. There are no emulsifiers, no seed oils, no palm oil and no added cane sugar, which also means there is no vegetable fat standing in for the butter. Every batch is tested for lead, cadmium and pesticides, and the daily dose printed on the pack is four buttons. The full declaration is on the Chaski Cacao product page, and the rest of our process notes sit in the Chaski guides library.

Frequently Asked Questions

Is cacao butter the same as cocoa butter?

Yes. They are the same fat from the same bean, and British law uses the single reserved description "cocoa butter" for it, defined as the fat obtained from cocoa beans or parts of cocoa beans. The "cacao" spelling is used more often by sellers positioning a product as less processed, and more often on raw or minimally refined lines, but it does not denote a different material or a different standard. If a label uses both spellings in different places, that is a stylistic inconsistency rather than two ingredients.

Why does chocolate melt in the mouth but not in the hand?

Because cacao butter does nearly all of its melting over a narrow span of temperature rather than softening gradually. Tempered chocolate is set in crystal form V, which Lonchampt and Hartel's 2004 review lists at 30.7 °C using the Davis and Dimick figures. That sits below mouth temperature and above most room and hand temperatures, so a button holds its shape until it is eaten. The sharpness comes from three triglycerides, POS, SOS and POP, making up most of the fat.

What is the white film on old chocolate?

It is usually fat bloom, which is the cacao butter recrystallising. Lonchampt and Hartel's 2004 review in the European Journal of Lipid Science and Technology states that bloom during storage is always accompanied by a transition from the form V crystal to the more stable form VI, listed at 33.8 °C. Bloom is a texture and appearance problem rather than a sign of spoilage. Storing chocolate at a steady cool temperature, away from warm cycles, is what slows the transition down.

Is cacao butter added to dark chocolate?

Often, yes. Manufacturers add extra cacao butter to adjust how a chocolate flows in the mould and how it sets, and the addition is declared in the ingredients list. A dark chocolate made only from cacao and sugar will show no separate butter line, because all the fat came with the bean. Neither route is hidden: the ingredients list, read in declaration order, tells you which one you are holding. The cacao percentage counts total cocoa solids, so added butter raises it.

How much cacao butter does the law require in chocolate?

Under Schedule 1 of the Cocoa and Chocolate Products (England) Regulations 2003, a product sold as "chocolate" must contain at least 35% total dry cocoa solids, of which at least 18% is cocoa butter and at least 14% is dry non-fat cocoa solids. Chocolate couverture is stricter at 31% cocoa butter. Cocoa powder must retain at least 20% cocoa butter on a dry matter basis, and anything below that is defined separately as fat-reduced cocoa.

Sources

See where the fat came from

Chaski Cacao — 600 g tube, 77% dark, low-temperature ground, no added fats

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