Green Bean Casserole

Name: Green Bean Casserole
Prep time: 1 h 10 min
Total time: 1 h 45 min
Yield: 8 to 10 servings
Ingredients: 1 1/2 cups panko breadcrumbs; 9 tablespoons unsalted butter; 1 medium yellow onion, small dice (about 1 1/2 cups); 2 pounds green beans, ends trimmed and cut into 1-1/2-inch pieces; Freshly ground black pepper; 12 ounces cremini mushrooms, stems trimmed and cut into small dice; 1/3 cup all-purpose flour; 4 cups (1 quart) whole milk, at room temperature; 1 1/2 teaspoons kosher salt, plus more for seasoning

Casserole Christmas Thanksgiving Dinner Party Potluck Vegetarian Milk Butter Side Dish Salt Holidays Flour Comfort Food Vegetables Easy Panko Breadcrumbs

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Rate

8 to 10 servings Easy

Total: 1 hr 45 mins Active: 1 hr 10 mins

14 Ratings

Ingredients (9)

1 1/2 cups panko breadcrumbs
9 tablespoons unsalted butter
1 medium yellow onion, small dice (about 1 1/2 cups)
2 pounds green beans, ends trimmed and cut into 1-1/2-inch pieces
Freshly ground black pepper
12 ounces cremini mushrooms, stems trimmed and cut into small dice
1/3 cup all-purpose flour
4 cups (1 quart) whole milk, at room temperature
1 1/2 teaspoons kosher salt, plus more for seasoning

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Nutritional Information

Calories303
Fat17.68g
Saturated fat10.58g
Trans fat0.52g
Carbs30.19g
Fiber4.45g
Sugar11.93g
Protein9.08g
Cholesterol46.55mg
Sodium438.71mg
Nutritional Analysis per serving (8 servings) Powered by

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Thanksgiving just wouldn’t be the same without green bean casserole. The rich, creamy, crispy-topped side dish is as essential as gravy or cranberries, and like them, it’s way better when you make it from scratch instead of opening cans. Here, we ditch the canned condensed soup and fried onions for a creamy mushroom sauce made from scratch, under an onion–panko breadcrumb topping that complements the fresh green beans. It takes more time to make than the easy old-school version, but it’s worth it.

For more green bean sides, check out our Green Beans with Shallots, Green Beans with Smoked Bacon, and Herbed Green Bean Casserole.

See our Ultimate Thanksgiving Guide for more tips, tricks, and recipes.

by Amy Wisniewski

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Instructions

1Heat the oven to 350°F and arrange a rack in the middle.
2Place the panko in a large frying pan over medium heat and toast, stirring occasionally, until golden brown, about 10 minutes. Transfer to a small bowl and set aside.
3Wipe out the frying pan with paper towels, add 3 tablespoons of the butter, and melt over medium heat until foaming. Add the onion and cook, stirring occasionally, until just softened and starting to brown, about 15 minutes.
4Meanwhile, bring a large pot of heavily salted water to a boil over high heat. Add the green beans and cook until they’re bright green and crisp tender, about 3 minutes. (They will not be fully cooked.) Drain in a colander and rinse under cold water until the beans are cooled, then set aside. Reserve the large pot.
5When the onions are ready, remove the frying pan from the heat. Remove 1/4 cup of the onions and set aside. Add the toasted panko to the pan with the remaining onions, season with salt and pepper, and stir to combine. Return the panko-onion mixture to the small bowl and set aside.
6Wipe out the frying pan with paper towels, add the remaining 6 tablespoons of butter, and melt over high heat until foaming. Add the mushrooms and cook, stirring occasionally, until browned and the liquid from the mushrooms is almost all evaporated, about 5 to 6 minutes.
7Reduce the heat to medium and add the reserved 1/4 cup of onions to the pan. Sprinkle with the flour, season with salt and pepper, and stir to coat the vegetables. Cook, stirring frequently, until the raw taste of the flour is cooked off, about 1 minute. Gradually whisk in the milk, add the measured salt, and bring to a simmer. Continue simmering, stirring often, until the mushroom mixture has thickened slightly, about 1 to 2 minutes more.
8Transfer the mushroom mixture to the reserved large pot, add the reserved green beans, and stir to combine. Taste and season with salt and pepper as needed. Transfer to a 13-by-9-inch baking dish and bake for 10 minutes. Remove the casserole from the oven, evenly sprinkle the reserved panko-onion mixture across the top, and continue baking until the casserole’s bubbling around the edges and heated through, about 10 to 15 minutes more. Place the pan on a wire rack and let cool 10 minutes before serving.

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