Side Dishes
This Campbell's green bean casserole recipe with cream of mushroom sauce brings the ultimate harmony of crunchy fried onions and velvety richness in every bite. The key lies in layering the ingredients precisely and baking until the top turns golden brown—just like your favorite holiday memory.
I’ve tested countless variations, and this method guarantees a restaurant-quality result without the fuss.
What makes this recipe special is the simplicity of its components: Campbell’s cream of mushroom soup, fresh green beans, and a crunchy fried onion topping that adds texture. The secret to achieving that signature crispy top is spreading the onions evenly and baking at the right temperature.
Trust me, this is the side dish that transforms any meal into a comforting classic.
By the time it emerges from the oven, you’ll have a creamy, velvety casserole with a golden, crunchy finish that’s impossible to resist. The flavors meld together beautifully—tangy mushrooms, tender green beans, and the perfect balance of saltiness from the onions.
This is the kind of dish that brings warmth to the table and leaves everyone asking for seconds.
Serve it alongside roasted chicken, ham, or even as a standalone dish for potlucks and family gatherings. The best part? It’s easy to scale up for crowds, making it the ultimate crowd-pleaser. Let’s get started on creating this timeless comfort food.
Ingredients for campbell's green bean casserole recipe with cream of
The magic starts with these 11 ingredients—creamy, crunchy, and pure comfort in every bite.
| Ingredient | Amount | Notes |
|---|---|---|
| Campbell's Cream of Mushroom Soup 🍄 | 2 cans | Condensed, not ready-to-serve |
| Fresh Green Beans 🥦 | 1 ½ lb | Trimmed, cut into 2-inch pieces |
| Milk 🥛 | ½ cup | Whole milk for creaminess |
| Butter 🧈 | ½ cup | Unsalted, softened slightly |
| All-Purpose Flour 🌾 | ¼ cup | For thickening sauce |
| Salt 🧂 | 1 ½ tsp | Adjust to taste |
| Black Pepper 🌶️ | ½ tsp | Freshly ground preferred |
| Garlic Powder 🧄 | ½ tsp | For extra depth |
| Fried Onions 🧅 | 1 ½ cups | Store-bought or homemade |
| Shredded Cheese 🧀 | 1 cup | Cheddar or Swiss blend |
| Heavy Cream 🥛 | ¼ cup | Optional for extra richness |
The Campbell's Cream of Mushroom Soup is the backbone here—grab the condensed version (not ready-to-serve) for that ultra-thick, velvety texture. Trader Joe's and Walmart always have it in stock, and it's cheaper than the fancy brands. Fresh green beans? Look for vibrant, crisp ones—the ones with a bright green color and no slimy spots. If you're short on time, frozen green beans (thawed and drained) work perfectly too. The fried onions? Store-bought is fine—just make sure they're the crispy, crunchy kind (not the soft ones). For the ultimate crispy top, I swear by French's brand—it's the only one that gives that perfect golden crunch.
No Campbell's soup? Homemade mushroom sauce (blend cooked mushrooms, milk, and a little flour) works in a pinch. Heavy cream optional but worth it—it makes the whole thing silky smooth. Swapping the cheddar? Swiss or Gruyère adds a nutty depth that pairs beautifully with the mushrooms. The flour is just for thickening—if you're gluten-free, use cornstarch instead (same amount). For extra garlic flavor without fresh cloves, garlic powder does the trick. And if you're making this ahead? Double the fried onions—they get softer as they sit, and you want that crunchy contrast!
This casserole tastes even better the next day—make it ahead and bake it fresh when guests arrive. Store leftovers covered in the fridge for up to 4 days, but honestly, it won’t last that long. Freezes beautifully for 3 months—just bake straight from frozen (add 10 minutes). Pro tip: Sprinkle extra fried onions on top right before serving for maximum crunch. And if you're serving a crowd? Double the recipe—it scales perfectly, and everyone will ask for seconds.
Why You'll Love This Recipe
- Pantry-to-Table Magic: I swear by this recipe when I forget to meal prep. Just open a can of soup, snap those green beans, and—boom—dinner’s ready. No fancy ingredients, no stress.
- Creamy Crunch Combo: That buttery flour topping on crisp-tender green beans? It’s the best of both worlds. The mushroom soup adds depth, and the milk keeps it rich without being heavy.
- Leftovers That Don’t Suck: Honestly, this tastes even better the next day. I make a double batch on Sundays—some for dinner, some for lunches—because reheating it just melts everything together perfectly.
- Budget-Friendly Crowd-Pleaser: Fresh green beans might cost a little, but this recipe stretches easily. Add a can of soup, a splash of milk, and you’ve got a dish that feeds four for under $10. My college roommates still ask for it.
Step-by-step instructions for Campbell's green bean casserole with cream of mushroom
Here's how to create that perfect mix of crispy fried onions and creamy mushroom sauce—it's easier than you think!
Blanch and Prepare the Fresh Green Beans
Start by trimming the ends off all 1.5 lb fresh green beans and cutting them into 2-inch pieces. This size ensures even cooking and a perfect bite. Fill a large pot with water and bring it to a rolling boil. Once boiling, add the green beans and cook for 3-4 minutes—they should be bright green and slightly tender but still crisp. Immediately drain them in a colander and rinse under cold water to stop the cooking process. This blanching step preserves their vibrant color and slight crunch.
Transfer the blanched green beans to a large mixing bowl and set aside. This is where the magic begins—they'll soak up all that creamy mushroom goodness. I like to give them a gentle toss with a spoon to separate any that might be sticking together. The beans should feel warm but not mushy when you squeeze them lightly between your fingers.
Make the Creamy Mushroom Sauce
In a separate large bowl, open the 2 cans Campbell's Cream of Mushroom Soup and stir each can vigorously with a whisk to fully combine the ingredients. Then, add the 0.5 cup milk, 0.25 cup all-purpose flour, 0.5 cup butter (softened), 1.5 tsp salt, 0.5 tsp black pepper, 0.5 tsp garlic powder, and 0.25 cup heavy cream. Mix everything together until smooth and well combined—there should be no visible flour or butter clumps.
This sauce is the heart of your casserole, so take your time here. The flour helps thicken it slightly, while the butter and heavy cream add that luxurious creaminess. If you're using the optional heavy cream, now's the time to fold it in gently to maintain a silky texture. The mixture should be thick but still pourable—like heavy cream of mushroom soup consistency.
Combine the Green Beans with the Sauce
Pour the creamy mushroom mixture over the blanched green beans in the mixing bowl. Stir everything together gently but thoroughly until the beans are evenly coated. You'll see the sauce clinging to each piece, creating that beautiful creamy texture we're after. Here's the thing—don't overmix. Just enough to distribute the sauce evenly is perfect. Any extra mixing could make the beans mushy when baked.
Transfer the bean mixture to a 9x13-inch baking dish, spreading it out evenly in a single layer. This even distribution ensures the casserole cooks uniformly. I like to use a spatula to press the mixture down gently, helping it settle and creating a smooth surface for the crispy topping. The baking dish should be about three-quarters full—this gives the fried onions room to spread out beautifully.
Add the Crispy Topping
Sprinkle the 1.5 cups fried onions evenly over the top of the bean mixture. Press them down gently but firmly with the back of a spoon to ensure they stick and create that signature crispy layer. Then, sprinkle the 1 cup shredded cheese evenly over the fried onions. The cheese will melt and create a golden, bubbly crust that contrasts perfectly with the crispy onions.
This is where the magic happens—the contrast between the creamy green beans and the crispy, golden topping. The fried onions should be spread out so they're touching each other slightly, which helps them crisp up beautifully in the oven. If you're feeling fancy, you can even arrange them in a decorative pattern before pressing them down.
Bake to Golden Perfection
Preheat your oven to 350°F while you prepare the casserole. Once preheated, place the baking dish on the middle rack and bake for 45-50 minutes. You'll know it's ready when the top is deep golden brown and the cheese has melted into a bubbly layer. The edges should look slightly crispy, and the fried onions should be golden and crunchy.
Let the casserole rest for 10-15 minutes before serving. This resting time allows the cheese to set slightly and makes it easier to slice. The creamy mushroom sauce should be thick and rich, perfectly coating each green bean. Serve it warm with a side of crusty bread or a simple green salad—it's comfort food at its finest!
Pro Tips For Making Campbell'S Green Bean Casserole Recipe With Cream Of
- Blanch Beans First: Skip the mushy beans by blanching them in boiling water for 3-4 minutes before adding to the casserole. Drain, shock in ice water, and pat very dry—this keeps them crisp and prevents a watery sauce later. I learned this the hard way after serving a batch where the beans turned to mush.
- Melt Butter Slow: When making the roux (butter + flour), melt the butter over medium-low heat—high heat burns it fast and adds bitterness. Cook the flour mixture until it smells nutty but not browned, or your sauce will taste off. Sounds weird, but it works: the flavor difference is noticeable.
- Skip the Crowding: Don’t pack the green beans tightly into the baking dish—leave gaps for the sauce to seep through. Overcrowding steams them instead of crisping, and the top layer turns soggy. Trust me, your casserole will taste better if it looks a little sparse at first.
- Add Milk Gradually: When thinning the soup with milk, add it slowly while stirring constantly—dumping it all at once makes lumps. If it’s too thick, a splash of warm milk fixes it; if too thin, a quick simmer thickens it back up. No one likes a gloppy casserole, so take your time here.
Make-ahead tips for campbell's green bean casserole recipe with cream of
Prep Ahead for Holidays
This casserole is a holiday staple for a reason—it tastes even better when made ahead. Assemble the dish completely (up to the fried onions) in a 9x13-inch baking dish, cover tightly with plastic wrap, and refrigerate for up to 24 hours.
When ready to bake, sprinkle the fried onions and cheese, then bake as directed. The flavors meld beautifully overnight, making it perfect for Thanksgiving or Christmas prep. 📅
Freezer-Friendly Magic
For meal prep, assemble the casserole without the fried onions or cheese—they don’t freeze well. Cover the baking dish with heavy-duty foil and freeze for up to 3 months.
When ready to serve, thaw in the fridge overnight, top with fried onions and cheese, then bake from frozen at 350°F for 60-70 minutes. The extra time ensures the center reaches 165°F safely. 🧊
Double the Batch
Need to feed a crowd? This recipe scales perfectly—just double all ingredients and use a 9x13-inch and 8x8-inch baking dish simultaneously. Bake both dishes for 45-50 minutes on the same oven rack.
I’ve made this for 12+ people at family gatherings, and it’s always a hit. Serve with warm dinner rolls to soak up the creamy sauce. 👨👩👧👦
Reheat Like a Pro
Leftovers? No problem. Cover the casserole with foil and reheat at 325°F for 20-25 minutes until bubbly. For microwave reheating, cover with a damp paper towel and heat in 1-minute intervals on 50% power, stirring between each interval.
Add a splash of milk or cream if it looks dry. The texture stays creamy, not soggy. 🔥
Make It Ahead for Potlucks
Bring this to your next potluck by assembling it the night before and baking it fresh at the event. Use a disposable foil pan for easy transport, and cover it with a clean kitchen towel to keep it warm.
Guests will think you slaved away all day—while you actually just pressed a few buttons on your oven! 🎉
Crispy Top Hacks
Want that restaurant-quality crunch? Sprinkle the fried onions right before baking (not ahead) to keep them extra crispy. For even more drama, broil for 1-2 minutes at the end of baking—watch the cheese bubble like a golden cloud!
If you’re short on time, toasted breadcrumbs mixed with cheese can replace fried onions for a budget-friendly twist. 🧅
Nutrition facts
Frequently asked questions
Can I use cream of celery soup instead of mushroom?
Cream of celery soup works beautifully and adds a slightly different flavor profile. The recipe stays the same—just swap the mushroom soup for celery. For extra depth, add a pinch of celery salt or a dash of lemon juice to brighten the flavors. The creamy texture remains identical.
Why does my casserole top get soggy instead of crispy?
Soggy tops usually happen when the onions aren't pressed down firmly or the oven isn't hot enough. Press the fried onions gently but firmly before baking, and ensure your oven is fully preheated to 350°F. For extra crispiness, broil for 1-2 minutes at the very end—just watch closely to avoid burning.
Can I make this with frozen green beans instead of fresh?
Yes! Frozen green beans work perfectly—just thaw and drain them thoroughly before mixing with the sauce. Skip the blanching step since they're already pre-cooked. The texture will be slightly softer, but the creamy mushroom flavor shines just as well. For best results, use high-quality frozen beans without ice crystals.
How do I make this dish ahead for Thanksgiving?
Assemble the casserole completely (up to adding the fried onions) in a 9x13-inch baking dish, cover tightly with plastic wrap, and refrigerate for up to 24 hours. Right before baking, sprinkle the onions and cheese, then bake as directed. The flavors meld beautifully overnight, and you'll avoid last-minute stress in the kitchen.
Can I make this gluten-free?
Yes, with a few adjustments! Replace the all-purpose flour with cornstarch (same amount) to thicken the sauce. Use gluten-free fried onions and ensure your cheese is certified gluten-free. The texture stays creamy, though the topping may be slightly less crisp. Test your ingredients first to confirm compatibility.