Quick bread is any bread leavened with a chemical leavening agent rather than a biological one like yeast or sourdough starter. An advantage of quick breads is their ability to be prepared quickly and reliably, without requiring the time-consuming skilled labor and the climate control needed for traditional yeast breads. Quick breads include many cakes, brownies and cookies—as well as banana bread, pumpkin bread, beer bread, biscuits, cornbread, muffins, pancakes, scones, and soda bread. History The term "quick bread" most probably originated in the United States at the end of the eighteenth century. However, the similar Bannock was well known in Ireland, Scotland and northern England centuries earlier. Before the creation of quick bread, baked goods were leavened either with yeast or by mixing dough with eggs. "Fast bread" is an alternate name. The discovery or rediscovery of chemical leavening agents and their widespread military, commercial, and home use in the United States dates back to 1846 with the introduction of commercial baking soda in New York, by Church and Dwight of "Arm & Hammer" fame. This development was extended in 1856 by the introduction of commercial baking powder in Massachusetts, although perhaps the best known form of baking powder is "Calumet", first introduced in Hammond, Indiana and West Hammond, Illinois (later Calumet City, Illinois) in 1889. Both forms of food-grade chemical leaveners are still being produced under their original names, although not within the same corporate structure. During the American Civil War (1861–1865), the demand for portable and quickly-made food was high, while skilled labor for traditional breadmaking was scarce. This encouraged the adoption of bread which was rapidly made and leavened with baking soda, instead of yeast. The shortage of chemical leaveners in the American South during the Civil War contributed to a food crisis there. As the Industrial Revolution accelerated, the marketing of mass-produced prepackaged foods was eased by the use of chemical leaveners, which could produce consistent products regardless of variations in source ingredients, time of year, geographical location, weather conditions, and many other factors that could cause problems with environmentally sensitive, temperamental yeast formulations. These factors were traded off against the loss of traditional yeast flavor, nutrition, and texture. Leavening process Preparing a quick bread generally involves two mixing containers. One contains all dry ingredients (including chemical leavening agents or agent) and one contains all wet ingredients (possibly including liquid ingredients that are slightly acidic