Cream (including light whipping cream) is a dairy product that is composed of the higher-butterfat layer skimmed from the top of milk before homogenization. In un-homogenized milk, over time, the lighter fat rises to the top. In the industrial production of cream this process is accelerated by using centrifuges called "separators". In many countries, cream is sold in several grades depending on the total butterfat content. Cream can be dried to a powder for shipment to distant markets. Cream produced by cows (particularly Jersey cattle) grazing on natural pasture often contains some natural carotenoid pigments derived from the plants they eat; this gives the cream a slight yellow tone, hence the name of the yellowish-white colour, cream. Cream from cows fed indoors, on grain or grain-based pellets, is white. In cooking, a sauce is liquid or sometimes semi-solid food served on or used in preparing other foods. Sauces are not normally consumed by themselves; they add flavor, moisture, and visual appeal to another dish. Sauce is a French word taken from the Latin salsus, meaning salted. Sauces need a liquid component, but some sauces (for example, salsa or chutney) may contain more solid elements than liquid. Sauces are an essential element in cuisines all over the world. Sauces may be ready made sauces, usually bought, such as soy sauce, or freshly prepared by the cook; such as BÃ©chamel sauce, which is generally made just before serving. Sauces for salads are called salad dressing. Sauces made by deglazing a pan are called pan sauces. A cook who specializes in making sauces is a "saucier".