EMULSIFICATION: THE STABLE FAT-IN-WATER SYSTEM

Emulsification has been understood practically in Western cooking since at least the 18th century, when mayonnaise emerged in the French culinary tradition (the Menorca origin story) and hollandaise in the 19th century court kitchen. The chemistry — lecithin as emulsifier, droplet size as stability determinant — was formalised by food scientists in the 20th century. Segnit's contribution is showing that these are not separate recipes but a single technique family with cultural variables.

An emulsion is fat dispersed in water (or water in fat) in droplets small enough to remain suspended rather than separating. The stable emulsion — from mayonnaise to hollandaise to vinaigrette to Caesar dressing — is one of the most versatile preparations in cooking and one of the most misunderstood. It is not primarily a flavour technique; it is a **distribution architecture** — the emulsion creates a medium in which fat-soluble and water-soluble compounds are simultaneously accessible to every bite.

• - Japanese *kewpie* mayonnaise uses rice vinegar and MSG alongside egg yolk — the emulsification principle is identical, the flavour profile is distinctly Japanese - Persian *mast-o-khiar* (yogurt and

Emulsified sauces serve as flavour-distribution architectures — they carry fat-soluble aromatics into contact with every element of the dish they dress. A well-made aioli distributes its garlic, olive oil, and acid evenly across every component it touches. This is the reason emulsified dressings and sauces taste more complex than the sum of their ingredients: the emulsification creates simultaneous access to multiple flavour dimensions.