Thursday is National Hamburger Day. The first hamburger likely appeared in the late 19th or early 20th centuries. Over the years, the hamburger has become a culinary icon in the United States. From early on, the hamburger was prepared with all of the now typically characteristic trimmings. including onions, lettuce and pickles.
In 1921, Walter A. Anderson (a short-order cook) and E.W. Ingram (an insurance executive) founded White Castle in Wichita, Kansas. It is the oldest hamburger chain. They served steam-fried hamburgers, 18 per pound of fresh ground beef, cooked on a bed of chopped onions, for a nickel.
The Big Mac was introduced in 1968. The price was 49 cents.
Hamburgers and Cheeseburgers comprise 71% of the beef servings in commercial restaurants. (2001)
Burgers account for 40% of all sandwiches sold. (2001)
65% of all hamburgers and cheeseburgers are consumed away from home. (2001)
BTW: The Hamburger hall of fame is located in Seymour, Wisconsin.
Hamburger Trivia: http://www.foodreference.com/html/fhamburgers.html