Mouthwatering Campbell’s Green Bean Casserole is the perfect mix of tender green beans, creamy mushroom sauce, and crispy fried onions on top. It’s a classic dish that’s full of comforting flavors and textures that everyone knows and loves. This casserole brings warmth and a little bit of nostalgia to the table.
I love making this green bean casserole when I want something quick but special for dinner or a holiday meal. Using Campbell’s cream of mushroom soup makes it so easy to throw together without losing any of that rich, creamy taste. The crispy fried onions added at the end give it that delightful crunch that I always look forward to—and that keeps me coming back for more.
Whenever I serve this casserole, it always sparks great conversations and happy smiles. I like to pair it with simple roasted turkey or chicken and some mashed potatoes. It’s the kind of side dish that feels like a warm hug on a plate, and I’m pretty sure it’s one of those recipes that never goes out of style in my house.
Key Ingredients & Substitutions
Green Beans: Fresh green beans add a nice crispness, but canned or frozen work well too. Just be sure to drain canned ones well to avoid a watery casserole.
Cream of Mushroom Soup: This is the creamy base and heart of the dish. If you want a homemade touch, you can make a simple mushroom sauce with butter, flour, milk, and sautéed mushrooms instead.
Milk: Regular milk keeps the sauce smooth. For a dairy-free option, unsweetened plant-based milks like almond or oat milk work fine.
French Fried Onions: These give the casserole its classic crunch on top. If you can’t find them, crushed crispy shallots or fried shallots make good substitutes.
How Do You Get the Crispy Fried Onion Topping Perfect Every Time?
Getting the fried onions crispy and golden is key to this dish. Add half of them into the casserole mixture, then save the rest for the top. Sprinkle them evenly just before the final bake.
- Bake the casserole uncovered for the last 5 minutes at 350°F (175°C).
- Watch carefully in this last stage so the onions brown but don’t burn.
- If you want extra crispness, you can broil for 1–2 minutes – keep an eye on them!
This finishing step makes sure you get that great crispy texture to contrast the creamy beans underneath. It’s the little detail that makes this casserole so memorable.

Equipment You’ll Need
- 9×13-inch baking dish – I use this size because it holds everything evenly and makes serving easy.
- Mixing bowl – for combining the soup, milk, and seasonings without a mess.
- Measuring cups and spoons – to get the ingredients just right.
- Spatula or spoon – for folding the green beans and fried onions into the sauce.
- Oven – standard for baking and crisping the topping perfectly.
Flavor Variations & Add-Ins
- Swap green beans for sliced fresh mushrooms for a meaty twist that’s just as creamy.
- Add cooked bacon bits or toasted almonds on top for extra crunch and flavor.
- Mix in a dash of hot sauce or cayenne pepper if you want a little heat in every bite.
- Use shredded cheese—like cheddar or Swiss—stirred into the mix for a cheesy variation.
Mouthwatering Campbell’s Green Bean Casserole
Ingredients You’ll Need:
- 4 cups cooked green beans (fresh or canned, drained)
- 1 can (10.5 oz) Campbell’s Cream of Mushroom Soup
- 1/2 cup milk
- 1 teaspoon soy sauce (optional, for depth of flavor)
- 1/4 teaspoon black pepper
- 1 1/3 cups French fried onions (divided)
How Much Time Will You Need?
This recipe takes about 10 minutes to prepare and 30 minutes to bake, making it a total of around 40 minutes. It’s a quick and easy side dish to whip up alongside your main meal!
Step-by-Step Instructions:
1. Preheat and Mix Ingredients:
Start by preheating your oven to 350°F (175°C). In a mixing bowl, combine the Campbell’s Cream of Mushroom Soup, milk, soy sauce (if using), and black pepper. Stir well until everything is smooth and well blended.
2. Combine Green Beans and Onions:
Add the cooked green beans and 2/3 cup of the French fried onions to your soup mixture. Gently fold everything together to make sure the beans are well coated with the creamy sauce.
3. Bake the Casserole:
Pour this mixture evenly into a baking dish. Bake it in your preheated oven for about 25 minutes, or until the casserole is hot and bubbly.
4. Add Topping and Finish Baking:
Carefully take the casserole out of the oven and sprinkle the remaining French fried onions on top. Return it to the oven and bake for another 5 minutes, or until the onions turn a golden brown and become crispy.
5. Serve and Enjoy:
Let the green bean casserole sit for a few minutes before serving. This helps it set a bit, making it easier to dish out. Enjoy the creamy, crispy goodness with your favorite main dish!
Can I Use Frozen Green Beans?
Yes! Just thaw and drain them well before using to avoid extra moisture in the casserole. You can also briefly steam or blanch them for a fresher texture.
Can I Make This Recipe Ahead of Time?
Absolutely! Prepare the casserole up to the baking step, cover it tightly, and refrigerate for up to 24 hours. When ready, bake as directed, adding a few extra minutes if needed.
How Should I Store Leftovers?
Store any leftovers in an airtight container in the fridge for up to 3 days. Reheat in the oven at 350°F until warmed through to keep the crispy topping intact.
What Can I Substitute for French Fried Onions?
If you don’t have French fried onions, crispy fried shallots or crushed crispy tortilla chips can add a nice crunch. Toast them lightly before topping.



