Emulsification

Oil and water don't mix — unless you know the physics. Emulsification is forcing two immiscible liquids into a stable, creamy suspension. It's the science behind vinaigrettes that don't separate, hollandaise that stays silky, and mayonnaise that holds its shape. The technique requires understanding ratios, temperature, and the role of emulsifiers like lecithin in egg yolks and mustard. Master it, and you unlock an entire category of sauces most home cooks consider "too hard."