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
Bread pan Bread pan A bread pan, also called a loaf pan, is a kitchen utensil in the form of a container in which bread is baked. Its function is to shape bread while it is rising during baking. The most common shape of the bread pan is the loaf, or narrow rectangle, a convenient form which enables uniform slicing. The bread pan is made from a conductive material such as metal which might be treated with a non-stick coating. It can also be made of heat resistant glass, ceramic, or a special type of paper that sticks to the dough but