Skimming / Dépouiller

Skimming — known in classical French kitchen parlance as dépouiller, meaning literally 'to skin' or 'to strip' — is the disciplined practice of drawing off the grey protein foam, rendered fat, and miscellaneous impurities that rise to the surface of a simmering stock, braise, or sauce. In the early stages of cooking, coagulating blood proteins form a dirty grey scum that must be removed promptly; as the liquid heats further, rendered animal fat pools on the surface and must be skimmed continuously to prevent it from re-emulsifying and turning the stock cloudy or greasy. The classic French technique exploits the geometry of the pot: the liquid is positioned slightly off-centre on the burner so that a rolling simmer circulates on one side, carrying impurities to the cooler far edge where they collect and can be ladled away cleanly. A wide, flat skimming ladle or a spider skimmer is drawn across the surface without disturbing the liquid. For finished sauces in the sauce pot, dépouiller also refers to the longer reduction process by which a sauce is 'pulled off its skin' — regularly pushing the skin that forms on the cool side with a spoon, which draws the fat-laden film into the ladle for removal. Cold-degreasing, where a finished stock is chilled and the solidified fat lifted off, is an alternative but does not substitute for hot skimming when clarity and cleanliness of flavour during cooking are required.

“She kept the veal stock barely trembling at a simmer and dépouillait every fifteen minutes, producing a consommé-clear fond that would anchor the sauce Madère.”

• TechniqueClarification (Consommé)
• TechniqueReduction
• ConceptMaillard Reaction

1. 1.Escoffier: The Complete Guide to the Art of Modern Cookery — Auguste Escoffier
2. 2.The Professional Chef, 9th Edition — The Culinary Institute of America
3. 3.Jacques Pépin: New Complete Techniques — Jacques Pépin
4. 4.Sauces: Classical and Contemporary Sauce Making — James Peterson

Confidence: high