With more than 1000 calories and usually over 45 grams of fat per serving, Luther burger is one of the world's unhealthiest burgers, but its flavors and a unique combination of ingredients make up for it. The standard burger bun is replaced by a sliced, sugar-glazed donut (usually a Krispy Kreme).

Aside from that, Luther is basically a cheeseburger topped with bacon, and it is typically served without vegetables or condiments. Many people believe that it was invented at Mulligan's Bar in Georgia, when the cook ran out of standard hamburger buns and used donuts instead.