This Loaded Green Bean Casserole takes the classic dish to a new level with cheddar cheese, crispy bacon, and sour cream added to the traditional green beans and cream of mushroom base. Topped with crunchy fried onions and garnished with chives, this creamy and cheesy casserole is a crowd-pleaser for holiday dinners or potlucks. Fresh green beans provide a crisp texture, but frozen beans can be used for convenience.