A symbol of modern convenience

The hamburger, now one of the most recognisable foods in global cuisine, has a history that stretches back to 19th century Europe and the culinary traditions of Hamburg in Germany. It is widely believed to have evolved from the Hamburg steak, a seasoned mince patty brought to the United States by German immigrants, where it gradually transformed into a sandwich served between slices of bread or a bun.

By the late 19th and early 20th centuries, street vendors and diners across America were...