Green Bean Casserole is a classic Southern side dish that’s perfect for holidays or family dinners. Made with tender green beans, a creamy mushroom sauce, sharp cheddar cheese, and crispy fried onions, this comforting casserole is easy to prepare and always a crowd-pleaser. Includes make-ahead, reheating, and freezing tips!
In a large mixing bowl, combine cream of mushroom soup, milk, green beans, seasoned salt, black pepper, garlic powder, shredded cheddar cheese, and ½ cup of the fried onions. Stir until evenly combined.
Transfer the mixture to a casserole dish and spread it evenly.
Bake for 15 minutes.
Remove from the oven, stir the casserole, and top with the remaining fried onions.
Return to the oven and bake for an additional 3–5 minutes, or until the fried onions are golden and crispy.
Serve warm.
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Notes
Green Beans: Use thawed and cooked frozen green beans for convenience, or blanch fresh green beans for a fresher texture. Avoid canned green beans, as they may become too soft.
Make-Ahead Option: Assemble the casserole up to a day in advance, but leave off the fried onion topping. Store covered in the refrigerator, and add the topping just before baking.
Storage: Store leftovers in an airtight container in the refrigerator for up to 3–4 days.
Freezing: Freeze the casserole without the fried onion topping for up to 3 months. Add fresh onions when reheating for the best texture.