Green bean casserole is a beloved American side dish, traditionally served during Thanksgiving and other festive gatherings. Originating in the 1950s thanks to Campbell’s test kitchen, it has earned its place on the holiday table due to its rich, creamy texture, crispy topping, and comforting flavor.
The blend of tender green beans, a savory mushroom-based sauce, and golden fried onions creates a delightful contrast of flavors and textures that makes this dish a nostalgic favorite across generations.
Ingredient
For the casserole:
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1 lb (450g) fresh green beans, trimmed and cut into 2-inch pieces
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1 can (10.5 oz) condensed cream of mushroom soup
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1/2 cup whole milk (or any milk of choice)
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1 tsp soy sauce (adds depth)
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1/2 tsp garlic powder
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1/2 tsp black pepper
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Salt to taste
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1 1/3 cups crispy fried onions (store-bought or homemade)
Optional substitutions:
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Use almond or oat milk for dairy-free version
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Replace cream of mushroom soup with a homemade mushroom roux for a from-scratch version
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Use gluten-free fried onions for gluten sensitivity
Step-by-Step Cooking Instructions
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Preheat the Oven
Set your oven to 350°F (175°C). Lightly grease a 9×13 inch baking dish. -
Blanch the Green Beans
Bring a pot of salted water to a boil. Add green beans and cook for 4-5 minutes until bright green and slightly tender. Drain and immediately transfer to an ice bath to preserve color and texture. Drain again. -
Mix the Sauce
In a large bowl, combine the cream of mushroom soup, milk, soy sauce, garlic powder, black pepper, and half of the crispy onions. Stir until well mixed. -
Combine
Fold the green beans into the sauce mixture until evenly coated. Pour the mixture into the prepared baking dish and spread evenly. -
Bake
Bake uncovered for 25 minutes. Carefully remove from oven. -
Top and Finish Baking
Sprinkle the remaining crispy onions over the top. Return to the oven and bake for another 5–10 minutes until the onions are golden and crunchy. -
Cool and Serve
Let the casserole sit for 5 minutes before serving to allow it to set.
Estimated total time: ~40 minutes
Prep time: 10 minutes
Cook time: 30 minutes
Common mistake to avoid:
Don’t overcook the green beans before baking—they’ll lose their texture and become mushy.
Pro Tips and Cooking Techniques
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Homemade Cream of Mushroom Sauce: Sauté mushrooms, garlic, and onions in butter, then add flour and broth to thicken—a tastier alternative to canned soup.
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For Extra Creaminess: Add a splash of heavy cream or a handful of grated cheddar cheese to the mixture.
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Use a Cast Iron Skillet: It doubles as a mixing bowl and baking dish, adds flavor, and makes for a rustic presentation.
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Toast the Onions: If using homemade onions, lightly toast them in a pan or oven beforehand for max crispiness.
Variations and Customizations
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Vegetarian: Use a mushroom roux and plant-based milk.
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Vegan: Choose a dairy-free soup, plant milk, and vegan fried onions.
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Gluten-Free: Use gluten-free soup and certified gluten-free fried onions.
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Low-Carb: Swap green beans for zucchini noodles or cauliflower florets.
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Fusion Twist: Add curry powder and coconut milk for an Indian-style twist.
Serving Suggestions
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Garnish: Sprinkle fresh thyme or chopped parsley on top for a fresh pop of color.
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Sides: Pairs beautifully with roasted turkey, mashed potatoes, stuffing, and cranberry sauce.
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Drinks: Try it with a crisp white wine, sparkling apple cider, or a light lager.
Nutritional Information (Approx. per serving, based on 6 servings)
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Calories: 190
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Protein: 4g
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Carbohydrates: 16g
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Fat: 12g
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Fiber: 3g
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Sodium: 560mg
Frequently Asked Questions (FAQs)
Can I make this casserole ahead of time?
Yes! Assemble everything except the final onion topping and refrigerate up to 2 days in advance. Add onions just before baking.
How do I store leftovers?
Store in an airtight container in the fridge for up to 3 days. Reheat in the oven at 350°F until warmed through to preserve the crispy top.
Can I freeze it?
It’s best fresh, but you can freeze it before baking. Thaw overnight in the fridge and bake as directed.
Why is my casserole watery?
Overcooked beans or extra watery soup can cause this. Make sure to drain beans well and use a thick soup base.
Closing Thoughts
Green bean casserole is more than just a side dish—it’s a memory in every bite. Whether you’re honoring tradition or adding your personal spin, this recipe is a versatile crowd-pleaser. So roll up your sleeves, preheat that oven, and bring some comfort to your table!
