Quick bread leavening process, agents (one or more food-grade chemicals—usually a weak acid and a weak base) are added into the dough during mixing. These agents undergo a chemical reaction to produce carbon dioxide, which increases the baked good's volume and produces a porous structure and lighter texture. Yeast breads often take hours to rise, and the resulting baked good's texture can vary greatly based on external factors such as temperature and humidity. By contrast, breads made with chemical leavening agents are relatively uniform, reliable, and quick. Usually, the resulting baked good is softer and lighter than a traditional yeast bread. Chemical
Rye bread fennel, coriander, aniseed, cardamom, or citrus peel. In addition to caramel and molasses, ingredients such as coffee, cocoa, or toasted bread crumbs are sometimes used for both color and flavor in very dark breads like pumpernickels. The addition of caraway seeds to rye bread is to counter the bloating that can be caused by the high fiber content of rye. Caraway has well-known anti-flatulence properties; however, the association is so long-standing that the flavor combination is now almost inseparable. A simple, all-rye bread can be made using a sourdough starter and rye meal; it will not rise as high as