Bread is a staple food prepared by baking a dough of flour and water. It may be leavened or unleavened. Salt, fat and leavening agents such as yeast and baking soda are common ingredients, though bread may contain a range of other ingredients: milk, egg, sugar, spice, fruit (such as raisins), vegetables (such as onion), nuts (such as walnuts) or seeds (such as poppy seeds). Bread is one of the oldest prepared foods, dating back to the Neolithic era. The development of leavened bread can probably also be traced to prehistoric times.

Fresh bread is prized for its taste, aroma, quality and texture. Retaining its freshness is important to keep it appetizing. Bread that has stiffened or dried past its prime is said to be stale. Modern bread is sometimes wrapped in paper or plastic film, or stored in a container such as a breadbox to keep it fresh longer. Bread that is kept in warm, moist environments is prone to the growth of mold. Bread kept at low temperatures, for example, in a refrigerator, will develop mold growth more slowly than bread kept at room temperature. However, unwrapped bread kept in a typical household refrigerator will turn stale quickly due to the low humidity of the air.

The inner, soft part of bread is known to bakers and other culinary professionals as the crumb, which is not to be confused with small bits of bread that often fall off, called crumbs. The outer hard portion of bread is called the crust.

Etymology

The word itself, Old English bread, is common in various forms to many Germanic languages; such as Frisian brea, Dutch brood, German Brot, Swedish bröd, Norwegian and Danish brød (in Portuguese broa); it has been claimed to be derived from the root of brew. However, it may be connected with the root of break, for its early uses are confined to broken pieces, or bits of bread, the Latin crustum, and it was not until the 12th century that it took the place—as the generic name for bread—of hlaf (hlaifs in Gothic: modern English loaf), which appears to be the oldest Teutonic name; Old High German hleib and modern German Laib, or Finnish leipä, Estonian leib, and Russian хлеб (khleb) are similar (all are derived from the Old German word for "loaf").

History

main: History of bread

The development of leavened bread can probably also be traced to prehistoric times. Yeast spores occur everywhere, including the surface of cereal grains, so any dough left to rest will become naturally leavened.inote: p. 517 Although leavening is likely of prehistoric origin, the earliest archaeological evidence is from ancient Egypt. Scanning electron microscopy has detected yeast cells in some ancient Egyptian loaves. However, ancient Egyptian bread was made from emmer wheat and has a dense crumb. In cases where yeast cells are not visible, it is difficult, by visual examination, to determine whether the bread was leavened. As a result, the extent to which bread was leavened in ancient Egypt remains uncertain.