You can thank the cows of Mesopotamia (part of present-day Iraq) for that burger. Farmers domesticated the first cattle there around 8000 B.C. when they started raising the animals to pull plows, as well as to provide milk and meat.
Fast-forward nearly 10,000 years. In the early 1800s, the residents of Hamburg, Germany, started cooking their prized cattle’s beef into a local specialty called frikadellen (FREE-kah-del-lin). The dish is a panfried patty seasoned with onions, garlic, salt, and pepper.
When hundreds of thousands of Germans immigrated to the U.S. in the mid-1850s, they brought frikadellen with them. Someone then made the dish easier to eat on the go by putting the patty between two slices of bread. No one knows for certain who deserves the credit for that, but restaurants across the U.S. claim to have invented the hamburger.
What we do know is that in 1921, two men in Wichita, Kansas, opened the country’s first fast-food hamburger joint: White Castle. Today Americans eat more than 50 billion hamburgers every year.