Bread have a special taste or texture. At one time, all yeast-leavened breads were sourdoughs. Recently there has been a revival of sourdough bread in artisan bakeries. Traditionally, peasant families throughout Europe baked on a fixed schedule, perhaps once a week. The starter was saved from the previous week's dough. The starter was mixed with the new ingredients, the dough was left to rise, and then a piece of it was saved (to be the starter for next week's bread). The rapid expansion of steam produced during baking leavens the bread, which is as simple as it is unpredictable. Steam-leavening is
Cockle bread in which the bread is mentioned: Writing in "Observations on the Popular Antiquities of Great Britain" in 1854, John Brand describes the nursery rhyme as "modern", but adds that its connection to the earlier "moulding" of cockle bread "is by no means generally understood". Cockle bread Cockle bread was an inferior type of British corn or wheat bread mixed with "cockle weed". In the 17th century a practice known as "moulding" cockle-bread had a sexual connotation. Cockle bread is also mentioned in a 19th-century nursery rhyme. The play "The Old Wives' Tale" by George Peele, first published in 1595, has