Love green bean casserole but running out of oven and stove space during the Thanksgiving meal prep? Try this recipe that uses your trusty slow cooker. We combine frozen beans with cream of chicken soup, some milk, cheese and of course fried onions,and cook until tender and delicious. In about 5 hours, the casserole is done! Be sure to top with more French-fried onions right before serving. Get the recipe for Slow Cooker Green Bean Casserole.