The green bean casserole, made with three simple ingredients, is the most popular recipe to come out of the corporate kitchen at Campbell Soup Company. The casserole has been a mainstay on Thanksgiving tables since 1955 when it was invented by Dorcas Reilly, a Campbell Soup kitchen supervisor. Reilly set out to make a quick and easy dish using items that most Americans already had in the kitchen. She determined many households had leftover cans of Campbell’s Cream of Mushroom soup and a stash of green beans. She mixed the two together and added a crunchy topping of fried onions to provide color and texture and a Thanksgiving staple was born. In 2002, Reilly donated the original copy of her green bean casserole recipe to the National Inventor’s Hall of Fame. The aged 8 x 11 recipe card now sits among other famous inventions, such as Edison’s light bulb and phonograph.