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
Sandwich bread to not become crumbly, hardened, dried or have too squishy a texture. Sandwich bread can refer to cross-sectionally square, sliced white and wheat bread, which has been described as "perfectly designed for holding square luncheon meat". The bread used for preparing finger sandwiches is sometimes referred to as sandwich bread. "Pan de mie" is a sandwich loaf. Some sandwich breads are designed for use in the creation of specific types of sandwiches, such as the submarine sandwich. For barbecuing, use of a high-quality white sandwich bread has been described as suitable for toasting over a fire. Gluten-free sandwich bread may