Can I use fresh, frozen, or canned green beans?

Fresh beans give the best texture, with a bright snap that holds up beautifully under the creamy sauce. Frozen beans are a solid backup, but thaw them fully and squeeze out every drop of water first, since extra moisture is the top cause of a soupy casserole. Canned beans work in a pinch, though they turn softer and saltier, so drain them well and cut back on the added salt.

Can I make the crispy fried onions from scratch?

Yes, and they are worth the extra twenty minutes if you want the crispiest possible topping. Toss very thinly sliced onions in seasoned flour, then shallow fry them in hot oil until deep golden and drain them on a wire rack. Homemade onions taste fresher and stay crisp longer than the store bought kind.

Why did my sauce turn out watery or split?

A watery sauce almost always comes from beans that were not drained well or mushrooms that were crowded and steamed instead of browned. A split sauce usually means the cream boiled too hard, so keep the simmer gentle and steady. Next time, make sure the sauce looks thick in the skillet before the dish goes into the oven.

Can I use frozen green beans instead of fresh ones in green bean casserole?

Yes, frozen beans are the best substitute in this green bean casserole when fresh ones are out of season or short on time. Thaw them completely, then pat them very dry with a clean kitchen towel so their extra moisture does not thin the sauce. Blanching is optional for frozen beans, since they are already partially cooked before freezing.

How do I reheat it without the topping going soft?

The oven is the only method that truly works, because the microwave steams the topping and turns it soggy. Reheat the casserole at 350 degrees for about 20 minutes, then uncover it for the last 5 minutes so the onions crisp again. For the crunchiest result, add a small handful of fresh fried onions right before serving.

Green Bean Casserole: Creamy And Crispy Classic

Ingredients

Scale

2 pounds fresh green beans, trimmed and cut into 2 inch pieces
8 ounces cremini mushrooms, thinly sliced
1 medium yellow onion, finely diced
3 garlic cloves, minced
4 tablespoons unsalted butter, divided
1/4 cup all purpose flour
2 cups low sodium chicken or vegetable broth
1 cup half and half
1 tablespoon soy sauce
1 teaspoon kosher salt, plus more to taste
1/2 teaspoon freshly ground black pepper
1/4 teaspoon freshly grated nutmeg
1 1/2 cups crispy fried onions, divided

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Instructions

Position a rack in the center of the oven and heat it to 375 degrees Fahrenheit. Lightly grease a 9 by 13 inch baking dish and set it aside.
Bring a large pot of generously salted water to a rolling boil. Add the green beans and blanch for 3 to 4 minutes, until bright green and crisp tender. Transfer immediately to ice water, then drain very well in a colander.
Melt 3 tablespoons of butter in a large skillet over medium high heat. Add the mushrooms in a single layer and cook undisturbed for 2 to 3 minutes. Stir and cook 4 to 5 minutes more, until deeply golden and their liquid has evaporated.
Add the diced onion and cook 4 to 5 minutes, stirring often, until soft and translucent. Stir in the garlic and cook 30 seconds more, just until fragrant.
Sprinkle the flour evenly over the vegetables and stir constantly for 1 to 2 minutes. The mixture will look pasty and cling to the mushrooms, which is exactly right for a roux.
Pour in the broth a little at a time, whisking constantly to keep the sauce smooth. Whisk in the half and half once all the broth is added. Bring to a gentle simmer and cook 3 to 4 minutes, stirring often, until it thickly coats a spoon.
Stir in the soy sauce, salt, pepper, and nutmeg, then taste the sauce. It should taste well seasoned and savory, so add another pinch of salt if it seems flat. Remember the fried onions will add more salt at the end.
Add the drained beans to the skillet and fold gently until every bean is coated. Transfer the mixture to the prepared baking dish and spread it into an even layer.
Bake for 20 to 25 minutes, until the sauce bubbles around the edges. The top will look creamy and pale, which is normal before the golden topping goes on.
Remove the dish and give the beans a gentle stir so the heat distributes evenly. Sprinkle the remaining fried onions over the top in an even layer. Return to the oven for 5 to 8 minutes, until deep golden and crisp.
Let the casserole rest 5 to 10 minutes before serving so the sauce settles. It will slice and scoop much more neatly after this short wait.

Author: Cookaza
Prep Time: 20 minutes
Cook Time: 35 minutes