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Classic Green Bean Casserole: Easy 3-Step Recipe

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This classic green bean casserole with creamy mushroom sauce and crispy onions is the ultimate comfort food side dish. Quick and easy to make in under 40 minutes, it’s perfect for holidays or weeknight dinners.

Ingredients

Scale
  • 16 oz (454 g) frozen French-cut green beans, defrosted and drained
  • 1 can (10.5 oz or 298 g) cream of mushroom soup
  • ¾ cup (180 ml) whole milk
  • 1 teaspoon (5 ml) soy sauce
  • ½ teaspoon (1 g) black pepper, freshly ground
  • ¼ teaspoon (0.5 g) garlic powder (optional)
  • 1½ cups (about 85 g) store-bought crispy fried onions
  • Optional: extra crispy onions for garnish

Instructions

  1. Preheat your oven to 350°F (175°C). Position the rack in the center of the oven. Defrost the frozen green beans by placing them in a colander and running cool water over them for 2-3 minutes. Let them drain thoroughly, then pat dry with a clean kitchen towel or paper towels.
  2. In a large mixing bowl, combine the cream of mushroom soup, milk, soy sauce, black pepper, and garlic powder. Whisk or stir until smooth and well combined.
  3. Add the drained green beans to the bowl and stir gently until every bean is coated in the sauce.
  4. Transfer the mixture to a greased 9×13-inch baking dish and spread into an even layer.
  5. Bake uncovered for 15 minutes.
  6. After 15 minutes, remove the dish from the oven and sprinkle the crispy fried onions evenly over the top.
  7. Return the dish to the oven and bake for an additional 10-12 minutes, or until the onions are golden brown and the casserole is bubbly and hot throughout.
  8. Let the casserole rest for 5 minutes before serving. Garnish with reserved crispy onions if desired.

Notes

For best results, drain the green beans really well to avoid a watery casserole. Don’t skip the soy sauce—it adds umami depth. For extra crunch, toast the crispy onions on a baking sheet for 3-5 minutes before adding. To make ahead, assemble without the onion topping up to 24 hours in advance; add 10-15 minutes to baking time.

Nutrition

Keywords: green bean casserole, classic green bean casserole, easy green bean casserole, holiday side dish, Thanksgiving side dish, comfort food, creamy mushroom sauce, crispy onions

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