Green bean casserole is one of the most famous Thanksgiving side dishes. While the dish has been around since the 1950s, it has only recently become really renowned. In addition, its creamy texture and rich flavor make it a welcome addition to any holiday table.  Although there are many variations on the basic recipe, most green bean casseroles include a can of condensed cream of mushroom soup, green beans, and fried onions. Some recipes also call for cheese, bacon, or other ingredients. Regardless of the ingredients, green bean casserole is a delicious and easy way to add some extra vegetables to your Thanksgiving feast.