Cocoa Butter

Why cocoa butter blooms and other fats do not

Cocoa butter is polymorphic, meaning its fat molecules can pack into several different crystal structures. Some of those forms are stable and some are not. When the butter warms enough to soften and then cools again, part of it recrystallizes into a different form and separates toward the surface, where it shows as a whitish layer or a faint grain. Nothing has gone off, nothing has grown, and the composition is unchanged.

• Several crystal forms, one fat. The film is the same material rearranged, not a new substance.
• A temperature swing is the trigger. Warming then cooling is what does it, rather than time alone.
• It is harmless and reversible in use. Rubbing it between the fingers melts it straight back in and the film does not return until the next warm spell.
• Nothing to do with mold. Mold needs water and these formulas are almost entirely fat.

It brings a smell you cannot remove

Unlike a neutral base, cocoa butter smells strongly and unmistakably of chocolate. Deodorized versions exist and lose some of it, but a genuine cocoa butter formula always carries a trace. The perfumer either builds around that or fights it, and in a line of dessert scents building around it is usually the better answer. It is why birthday cake, glazed donut and cereal accords sit on cocoa here rather than on something neutral.

• Chocolate underneath everything. You are smelling the fragrance plus the base, never the fragrance alone, and no amount of perfume covers it completely.
• It suits sweet accords. Bakery and dessert scents gain from it, because the chocolate reads as part of the composition rather than as interference; anything green or citrus does not.
• The neutral alternative. Where a scent needs a blank surface, the range uses mango butter instead.

The firmest of the three bases

Cocoa butter is high in stearic and palmitic acid, which sets hard at room temperature. It is the reason a cocoa based jar feels solid where a mango based one gives under a thumb, and the reason cocoa holds the air in a whipped formula longer than the softer bases do. It also needs a moment of warmth before it spreads.

• It sets firm and stays firm. Below about 86 degrees Fahrenheit it behaves as a solid.
• It holds a whip better. A firmer fat traps air more securely, which matters in transit.
• Warm it before applying. A few seconds between the palms is the difference between spreading and dragging.
• Mostly butters, plus a scrub. The scrub uses it as the leave-behind film described on the sugar scrub page.