'Do you want Belgian fries with that?" That's what you might be hearing at fast-food restaurants today if it hadn't been for World War I. The Belgians claim to have invented "French" fries, though no one knows for sure. The dish was first prepared as early as the 1700s and was simply called fried potatoes. Thomas Jefferson sampled them in Paris and brought the recipe home. At a White House dinner in 1802, the menu included "potatoes served in the French manner." But that's not how they got their name.
Their commercial success began in 1864, when Joseph Malines of London put "fish and chips" (French fries) on the menu. His success inspired others across Europe. But they weren't French fries until 1918 or so. American soldiers stationed in France gobbled up fried potatoes. They dubbed them "French fries" and liked them so much they wanted to have them at home, too. Americans still love French fries. Last year alone, more than 4.5 billion pounds of them were sold in the United States.