Udon - Thick wheat noodles used in Japanese cooking.

Ugli - An irregular-shaped citrus fruit hybrid between a grapefruit and a tangerine native to Jamaica. It is available around the United States from winter to spring. It has an acid-sweet flavor and is an excellent source of vitamin C.

Umido - [Italian] stew.

Unleavened - Bread made without a raising agent. Baked thin.

Unsaturated fats - Mainly come from plants and are liquid (oil) in form. Largely polyunsaturated fats include corn oil, soybean oil, sunflower oil, and sesame oil. Largely monounsaturated fats, which may lower blood cholesterol levels, include olive oil, canola oil, and peanut oil.

Unsweetened chocolate - Chocolate with no added sugar; generally composed of 55% cocoa butter and 45% chocolate mass from the bean. Produces an intense chocolate flavor that must be tempered by sugar and other ingredients.

Upside down cake - A cake made by arranging fruit in the baking pan, over which the batter is poured. When cooled it is inverted so that the fruit is on the top.

Uvas - [Spanish] grapes.