Bread unpredictable since the steam is not produced until the bread is baked. Steam leavening happens regardless of the raising agents (baking soda, yeast, baking powder, sour dough, beaten egg white) included in the mix. The leavening agent either contains air bubbles or generates carbon dioxide. The heat vaporises the water from the inner surface of the bubbles within the dough. The steam expands and makes the bread rise. This is the main factor in the rising of bread once it has been put in the oven. CO generation, on its own, is too small to account for the rise. Heat
Amish friendship bread cake and coffee cake. The flavor of the finished product can be altered by cinnamon being omitted. A common recipe using this starter suggests using one cup (240 ml) of it to make bread, keeping one cup to start a new cycle, and giving the remaining three cups to friends. The process of sharing the starter makes it somewhat like a chain letter. One cup of starter makes one standard loaf of bread. There is no reason to think that the sweet, cinnamon-flavored bread has any connection to the Amish people, although the name is taken from them. According to