In culinary terminology, an emulsion is said to break when its dispersed droplets merge and the mixture separates into visible layers or becomes greasy, grainy or curdled. This commonly occurs in mayonnaise, hollandaise, beurre blanc and other sauces that rely on a stable mixture of fat and water.
For mayonnaise, start with a fresh egg yolk or a small amount of water in a clean bowl and gradually whisk the broken mixture into it. For hollandaise or another warm sauce, begin with a small amount of warm water or a fresh yolk base and incorporate the broken sauce gradually, using gentle heat. The best method depends on the sauce and the reason it broke; a severely overcooked egg mixture may not be recoverable.
Breaking usually describes separation of the fat and water phases in an emulsion. Curdling describes the clumping or coagulation of proteins, which may occur alongside emulsion failure in egg- or dairy-based sauces.
Chef’s tip: Add fat gradually during initial emulsification and control the temperature. If a sauce begins to separate, stop adding fat and correct the emulsion before continuing.
Key distinction: A broken emulsion has lost its stable dispersed structure; it is not simply a sauce that has become too thick or reduced.
This term is one of hundreds covered in depth across OCS courses, learning paths, and 1-on-1 coaching with Chef Eric.
