Green Bean Casserole Recipe for 20 People

Green bean casserole is a classic comfort dish perfect for large gatherings, especially during holidays like Thanksgiving. This recipe is designed to serve 20 people, offering a creamy, crunchy, and flavorful side that everyone will enjoy. Its combination of tender green beans, savory mushroom gravy, and crispy fried onions makes it a crowd-pleaser that’s easy to prepare in advance and reheats beautifully.

Ingredients

• 4 pounds fresh green beans, trimmed (or 4 pounds frozen green beans, thawed)
• 2 large cans (10.5 oz each) condensed cream of mushroom soup
• 1 1/2 cups whole milk or heavy cream
• 2 teaspoons soy sauce (optional, for added depth)
• 1 teaspoon garlic powder
• 1/2 teaspoon black pepper
• 2 1/2 cups crispy fried onions, divided
• 1 cup shredded cheddar cheese (optional, for extra flavor)
• Salt, to taste

Instructions

1. Preheat your oven to 350°F (175°C). Grease a large 9×13-inch baking dish or a similar-sized casserole dish suitable for 20 servings.
2. Prepare the green beans: If using fresh green beans, blanch them in boiling water for 3-4 minutes until bright green and tender-crisp. Drain and immediately transfer to ice water to stop cooking. Drain thoroughly. If using frozen green beans, ensure they are fully thawed and drained well.
3. In a large mixing bowl, combine the cream of mushroom soup, milk or heavy cream, soy sauce (if using), garlic powder, black pepper, and shredded cheddar cheese (if using). Whisk until smooth and well combined.
4. Add the prepared green beans to the mixture and gently fold to coat evenly. Taste and adjust seasoning with salt if needed.
5. Pour the green bean mixture into the prepared baking dish, spreading it out evenly.
6. Sprinkle 1 1/2 cups of crispy fried onions evenly over the top of the casserole.
7. Bake uncovered in the preheated oven for 25-30 minutes, until the casserole is bubbling around the edges and heated through.
8. Remove from oven and sprinkle the remaining 1 cup of fried onions on top. Return to the oven and bake for an additional 5-7 minutes, until the onions are golden brown and crispy.
9. Let the casserole sit for 5 minutes before serving to allow it to set slightly. Serve hot and enjoy!

Tips

• For a vegetarian version, use vegetable broth instead of milk and omit the cheese.
• To make ahead, assemble the casserole without the final fried onions, cover tightly with foil, and refrigerate for up to 24 hours. Add the fried onions just before baking.
• Use fresh green beans for the best texture, but frozen works well if fresh are unavailable. Avoid canned green beans, as they tend to be too soft and watery.
• Be cautious with the cooking time; overbaking can make the green beans mushy. Keep an eye on the casserole after the 25-minute mark.

Serving Suggestions

This green bean casserole pairs beautifully with roasted turkey, ham, or grilled chicken. Serve it alongside mashed potatoes, stuffing, and cranberry sauce for a traditional holiday feast. It also works well as a side dish for potlucks and large family dinners, adding a creamy, crunchy element to any meal.

Variations

• Cheesy Green Bean Casserole: Add extra shredded cheese (cheddar, mozzarella, or Gruyère) to the mixture for a richer flavor.
• Vegetable Mix: Incorporate sliced mushrooms, caramelized onions, or chopped bell peppers into the casserole for added texture and flavor.
• Gluten-Free: Use gluten-free fried onions and ensure the soup is labeled gluten-free to accommodate dietary restrictions.
• Vegan: Substitute the cream of mushroom soup with a vegan mushroom gravy and use plant-based cheese and fried onion alternatives.

Storage and Reheating

Leftover green bean casserole can be stored in an airtight container in the refrigerator for up to 3 days. For best results, reheat in the oven at 350°F (175°C) for about 15-20 minutes, uncovered, until hot and bubbly. To keep the fried onion topping crispy, reheat the casserole uncovered and add fresh fried onions on top after reheating if desired. Avoid reheating in the microwave for more than 5 minutes, as this can cause the crispy topping to become soggy.

Frequently Asked Questions

Can I prepare this casserole ahead of time?

Yes, you can assemble the casserole up to 24 hours in advance. Cover it tightly with plastic wrap or foil and refrigerate. Add the fried onions just before baking to maintain their crunch.

What if I don’t have fried onions?

You can make your own crispy onions by thinly slicing yellow onions, tossing them with a little flour, and frying until golden brown. Alternatively, crunchy fried shallots or even crushed potato chips can be used as a topping.

Is this dish suitable for gluten-free diets?

It can be, if you use gluten-free fried onions and ensure the soup is labeled gluten-free. Always check ingredient labels to avoid gluten contamination.

Can I freeze leftovers?

Freezing is not recommended because the fried onion topping may become soggy upon thawing. However, you can freeze unbaked casserole (without fried onions) for up to 2 months. Thaw in the refrigerator overnight before baking and add fresh fried onions before reheating.

How do I prevent the casserole from becoming mushy?

Use fresh or properly thawed green beans, avoid overcooking during blanching, and bake it just until heated through. Do not overbake once assembled to maintain the desired texture.

What variations can I try for a lower-calorie version?

Use low-fat cream of mushroom soup, reduce or omit the cheese, and opt for baked crispy onions instead of fried ones. Incorporate more fresh vegetables to boost fiber and nutrients while keeping calories in check.

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