Simple yeast breads depend on flour for their character. The lightest are made with white all-purpose wheat flour, the foundation of household bread, sandwich bread, French bread and pizza dough. Many rolls are also made with white flour, the crust varying from crunchy to soft and golden. More varied simple yeast breads are made with whole wheat, or one of the many flours made from other grains. An addition of sprouted or cracked wheat, rye or wheat flakes, as well as finely processed oats, can transform plain white bread into a hearty loaf. The dense texture and rich flavor of German pumpernickel bread, for example, comes from rye flour, often with molasses or unsweetened chocolate added. Cornmeal can add a pleasant gritty texture: American anadama bread is a delicious example.