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
Bush bread Bush bread Bush bread, or seedcakes, refers to the bread made by Australian Aboriginals for many thousands of years, by crushing seeds into a dough, after which it is baked. The bread was high in protein and carbohydrate, and helped form part of a balanced traditional diet. With the arrival of Europeans and pre-milled white flour, this bread-making process all but disappeared (although women were still recorded to be making seedcakes in Central Australia in the 1970s). The tradition of cooking bread in hot coals continues today. Bread-making was a woman's task. It was generally carried out by several women