In-Depth Explanation
Emulsification is the science behind many essential sauces and dressings. Vinaigrettes, mayonnaise, hollandaise, and aioli are all emulsions. The key is adding oil very slowly to the aqueous phase while agitating vigorously, creating tiny oil droplets suspended in the liquid. Emulsifiers (egg yolk's lecithin, mustard's mucilage) coat these droplets and prevent them from recombining. A broken emulsion (where the oil separates) can often be rescued by starting fresh with a new egg yolk and slowly whisking the broken sauce back in. Understanding emulsification is one of the most practical skills in gourmet cooking.
Related Terms
Aioli
A Mediterranean sauce made from garlic, olive oil, and traditionally egg yolk. Originating from Provence and Catalonia, authentic aioli contains only garlic and oil, emulsified by mortar and pestle into a thick, pungent condiment.
Cold-Pressed
A method of extracting oil (typically olive oil) using mechanical pressure without heat or chemical solvents. Cold-pressing preserves the oil's flavor compounds, antioxidants, and nutritional value.