This classic green bean casserole with crispy onions is a comforting, crowd-pleasing side dish perfect for holidays and potlucks. Made with simple ingredients like cream of mushroom soup, green beans, and crispy fried onions, it comes together in about 45 minutes with minimal effort.
For extra-crispy onions, toast the reserved ⅔ cup on a baking sheet in the oven for 2-3 minutes before adding to the casserole. You can assemble the casserole (without the topping) up to 24 hours in advance; add 10 minutes to the covered baking time if starting from cold. If doubling the recipe, use a 9×13-inch dish and increase covered baking time to 35 minutes.
Keywords: green bean casserole, classic green bean casserole, holiday side dish, Thanksgiving side dish, easy casserole, creamy green bean casserole, crispy onion casserole