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 either batter-type or dough-type (similar to Irish soda bread). In such cases, it can be used in similar applications as whole wheat flour, since an egg matrix often provides the bread structure rather than the grain's gluten. Rye bread contains a large amount of fiber and a small amount of fat. Compared to some breads such as white bread, rye bread has a lower glycemic index, which means it causes a slower increase in blood sugar than white bread after being eaten. Nonetheless, it consists mostly of carbohydrates, making its glycemic load high. Rye bread Rye bread is a type