A creamy, crunchy green bean casserole that started as a kitchen mistake but became a family favorite. Made with frozen green beans, cream of mushroom soup, and crispy fried onions, this easy recipe comes together in under 45 minutes and is perfect for weeknight dinners or holiday feasts.
For best results, use frozen green beans (already blanched) instead of fresh to avoid a watery casserole. Stirring half the onions into the mixture ensures crunch in every bite. Let the casserole rest 5 minutes after baking so the sauce sets. To make ahead, assemble without the top layer of onions, refrigerate up to 24 hours, then add onions and bake for 35 minutes. For gluten-free, use gluten-free cream of mushroom soup and gluten-free crispy fried onions. For vegan, use dairy-free soup, oat milk, and vegan cheese.
Keywords: green bean casserole, easy green bean casserole, kid-friendly, Thanksgiving side dish, comfort food, homemade green bean casserole