Sylvester Graham was an American Presbyterian minister and dietary reformer known for his emphasis on vegetarianism, the temperance movement, and eating whole-grain bread. His preaching inspired the graham flour, graham bread, and graham cracker products. Graham is often referred to as the "Father of Vegetarianism" in the United States of America.

A graham cracker is a sweet flavored cracker made with graham flour that originated in the United States in the mid-19th century, with commercial development from about 1880. It is eaten as a snack food, usually honey- or cinnamon-flavored, and is used as an ingredient in some foods, e.g., in the graham cracker crust for cheesecakes and pies.