Best Green Bean Casserole Recipes

Steps:

• Preheat the oven to 475 degrees F.
• Combine the onions, flour, panko and salt in a large mixing bowl and toss to combine. Coat a sheet pan with nonstick cooking spray and evenly spread the onions on the pan. Place the pan on the middle rack of the oven and bake until golden brown, approximately 30 minutes. Toss the onions 2 to 3 times during cooking. Once done, remove from the oven and set aside until ready to use. Turn the oven down to 400 degrees F.
• While the onions are cooking, prepare the beans. Bring a gallon of water and 2 tablespoons of salt to a boil in an 8-quart saucepan. Add the beans and blanch for 5 minutes. Drain in a colander and immediately plunge the beans into a large bowl of ice water to stop the cooking. Drain and set aside.
• Melt the butter in a 12-inch cast iron skillet set over medium-high heat. Add the mushrooms, 1 teaspoon salt and pepper and cook, stirring occasionally, until the mushrooms begin to give up some of their liquid, approximately 4 to 5 minutes. Add the garlic and nutmeg and continue to cook for another 1 to 2 minutes. Sprinkle the flour over the mixture and stir to combine. Cook for 1 minute. Add the broth and simmer for 1 minute. Decrease the heat to medium-low and add the half-and-half. Cook until the mixture thickens, stirring occasionally, approximately 6 to 8 minutes.
• Remove from the heat and stir in 1/4 of the onions and all of the green beans. Top with the remaining onions. Place into the oven and bake until bubbly, approximately 15 minutes. Remove and serve immediately.

Steps:

• Make the casserole: Place the dried shiitake mushrooms in a small bowl and cover with boiling water, about 2 cups, and cover with plastic wrap. Let steep for 20 minutes. Strain through a fine mesh strainer, reserve 1/2 cup of the liquid and slice the steeped mushrooms.
• Melt the butter in a large Dutch oven over medium heat. Add the diced onion; cook, stirring, until softened, 7 to 10 minutes. Add the cremini and shiitake mushrooms; saute until softened and most of the liquid has evaporated, 10 minutes. Sprinkle in the flour; cook, stirring, 1 minute. Add the broth and mushroom liquid. Bring to a boil, then reduce the heat to medium-low and simmer until thickened, 5 to 10 minutes.
• Bring a pot of salted water to a boil. Add the green beans and cook until crisp-tender, 7 to 10 minutes. Drain; shake off any excess water and add to the mushroom sauce. Cook, stirring occasionally, until the beans are very tender and the sauce is thick, 10 to 12 minutes. Stir in the heavy cream and season with 2 teaspoons of salt and pepper.
• For the topping: Soak the sliced onions in the buttermilk, 5 minutes. Combine the flour and 1 teaspoon salt in a medium bowl. Heat 2 to 3 inches vegetable oil in a large pot until a deep-fry thermometer registers 350 degrees F. Working in batches, drain the onion, toss with the flour and shake off the excess, then fry until golden, 4 to 6 minutes. Drain on paper towels.
• Transfer the green bean mixture to a 4-quart baking dish and top with the fried onions. (The casserole and topping can be made up to 2 hours ahead; refrigerate the casserole. Bring to room temperature; reheat at 350 degrees F, 30 minutes. Top with the fried onion; bake 5 more minutes.)

Steps:

• Preheat oven to 350 degrees F (175 degrees C).
• Place green beans and soup in a large microwave-safe bowl. Mix well and heat in the microwave on HIGH until warm (3 to 5 minutes). Stir in 1/2 cup of cheese and heat mixture for another 2 to 3 minutes. Transfer green bean mixture to a casserole dish and sprinkle with French fried onions and remaining cheese.
• Bake in a preheated 350 degrees F (175 degrees C) oven until the cheese melts and the onions just begin to brown.