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 sauce or hazelnuts and served with chick pea salads and, most famously, with chicken or duck as Circassian chicken. Bread sauce A bread sauce is a warm or cold sauce made with milk, which is thickened with bread crumbs, typically eaten with roast chicken or turkey. The basic recipe calls for milk and onion with breadcrumbs and butter added as thickeners, seasoned with nutmeg, clove, bay leaf, pepper, and salt. A survivor of the medieval bread-thickened sauces, the traditional British bread sauce is made with milk, butter or cream, and bread crumbs, flavoured with onion, salt, cloves, mace, pepper, and bay