How long does green bean casserole stay fresh?

You can keep the casserole in the refrigerator for up to three days, stored in a covered container. When you're ready to enjoy it again, reheat in the oven at 350°F (175°C) for about 10 to 15 minutes, or use the microwave for a quick 2–3 minute warm-up. It also freezes well—store it in a freezer-safe container for up to two months.

Is it possible to make this casserole in advance?

Yes, it’s a great make-ahead option. Simply put the dish together, cover it, and place it in the fridge for up to 24 hours. When it's time to bake, remove it from the fridge, add the crispy topping, and cook as directed. This makes holiday or dinner prep much easier.

The Ultimate Guide to Campbell's Green Bean Casserole

Name: The Ultimate Guide to Campbell's Green Bean Casserole
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Cuisine: American
Ingredients: 2 cans (10.5 oz each) cream of mushroom soup; 2 cans cut green beans, well-drained (or substitute fresh or frozen green beans); 1 cup milk; 1 tablespoon soy sauce; 1 can (6 oz) crispy fried onions; Salt and pepper, to taste

Description

Campbell’s Green Bean Casserole is a holiday favorite that’s stood the test of time. Made with tender green beans, creamy mushroom soup, and topped with crispy fried onions, this nostalgic side dish is warm, savory, and incredibly easy to prepare. Perfect for Thanksgiving, Christmas, or comforting weeknight dinners.

Ingredients

Scale

2 cans (10.5 oz each) cream of mushroom soup
2 cans cut green beans, well-drained (or substitute fresh or frozen green beans)
1 cup milk
1 tablespoon soy sauce
1 can (6 oz) crispy fried onions
Salt and pepper, to taste

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Instructions

Preheat the oven: Set your oven to 350°F (175°C) and lightly grease a 9×13-inch casserole dish.
Combine ingredients: In a large bowl, mix the cream of mushroom soup, milk, soy sauce, salt, and pepper. Stir until smooth and well combined.
Add the green beans: Fold in the green beans until fully coated in the soup mixture.
Assemble the casserole: Pour the green bean mixture into your prepared casserole dish. Sprinkle half of the crispy fried onions on top.
Bake and finish: Bake uncovered for 25 minutes. Remove from the oven, top with the remaining onions, and bake for an additional 5–10 minutes until golden and bubbly.

Notes

Use low-sodium soup and soy sauce to reduce saltiness if preferred.
Substitute with dairy-free mushroom soup and plant-based milk for a vegan version.
Add shredded cheddar or mozzarella before the final bake for a cheesy variation.
Fresh green beans should be blanched before adding for best texture.

Prep Time: 10 minutes
Cook Time: 30 minutes
Category: Side Dish
Method: Baked
Cuisine: American

Nutrition

Serving Size: 1 portion (about 1/8 of casserole)
Calories: 210
Sugar: 3g
Sodium: 720mg
Fat: 14g
Saturated Fat: 5g
Unsaturated Fat: 8g
Trans Fat: 0g
Carbohydrates: 15g
Fiber: 2g
Protein: 4g
Cholesterol: 10mg