Some recipes don’t need reinventing, and green bean casserole is one of them. Creamy mushroom sauce, tender green beans and a crunchy blanket of fried onions on top. It’s been on American Thanksgiving tables since the 1950s for a reason: it’s cozy, it’s simple, and the crispy onion corners disappear first.
My version stays true to the original with a couple of small upgrades: a teaspoon of soy sauce and a little garlic powder for deeper savory flavor, and an optional sprinkle of sharp cheddar under the final onion layer. You can use canned or fresh green beans, and the whole thing can be assembled the day before.
Why You’ll Love It
- Ten minutes of prep. Stir everything together right in the baking dish.
- Make-ahead friendly. Assemble the day before and bake when the turkey comes out to rest.
- Nostalgic flavor. It tastes exactly like the one you grew up with, just a little better.
- Pantry staples. Easy to grab everything in one grocery trip.
Ingredients and Substitutions
Full amounts are in the recipe card below.
- Green beans: Two 14.5-ounce cans, well drained, or 1½ pounds fresh beans, blanched for 5 minutes. Thawed frozen cut beans work too; pat them dry.
- Cream of mushroom soup (one 10.5-ounce can): The classic base. Cream of chicken or a reduced-sodium soup also works.
- Milk (¾ cup): Thins the soup into a sauce.
- Soy sauce, garlic powder and pepper: Small additions for more savory depth.
- French fried onions (1⅓ cups): Half go inside, half on top for crunch.
- Sharp cheddar (optional): Not traditional, but a lot of families love it.
How to Make Green Bean Casserole
- Prep. Heat the oven to 350°F and grease a 1½-quart baking dish.
- Make the sauce. Whisk the soup, milk, soy sauce, garlic powder and pepper in the dish.
- Add the beans. Stir in the beans and half the fried onions.
- Bake. Bake uncovered for 25 minutes, until bubbling.
- Top and finish. Stir, add the cheese if using and the rest of the onions, and bake 5 more minutes.
Tips for Success
Dry the beans well
Extra water thins out the sauce. Drain canned beans thoroughly and pat blanched fresh beans dry.
Add the topping at the end
Fried onions burn if they bake for the full time. The last 5 minutes is all they need.
Storage and Make-Ahead
- Make ahead: Assemble without the onions, cover and refrigerate up to 1 day; stir in the first ⅔ cup of onions just before baking so they stay crisp. Bake 35 minutes, then top and bake 5 more.
- Leftovers: Refrigerate up to 3 days. Reheat at 350°F for about 15 minutes; the onions soften but still taste great.
- Freezer: Not recommended.
Frequently Asked Questions
Can I use fresh green beans?
Yes. Trim 1½ pounds, cut them in 2-inch pieces and boil for 5 minutes, then cool them in ice water and drain well.
Can I double it?
Yes. Double everything and bake in a 9×13-inch dish for about 30 minutes before topping.
Can I make it from scratch without soup?
Sure. Cook 8 ounces of sliced mushrooms in 2 tablespoons of butter, stir in 2 tablespoons of flour, then 1 cup of milk and ½ cup of broth, and simmer until thick. Use it in place of the soup and milk.
Classic Green Bean Casserole
Ingredients
Method
- Heat the oven to 350°F. Grease a 1½-quart baking dish.
- In the baking dish, stir together the soup, milk, soy sauce, garlic powder and pepper until smooth.
- Stir in the green beans and ⅔ cup of the fried onions.
- Bake uncovered for 25 minutes, until bubbling at the edges.
- Stir, sprinkle with the cheddar (if using) and the remaining ⅔ cup fried onions, and bake 5 minutes more until the onions are golden. Serve hot.
Notes
Save this recipe: Pin this classic green bean casserole to your Thanksgiving side dish board.
