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Classic Green Bean Casserole Recipe Easy Homemade with Crispy Fried Onions

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A nostalgic and comforting green bean casserole featuring fresh green beans, a creamy homemade mushroom sauce, and topped with crispy fried onions. Perfect for holidays, potlucks, or cozy family dinners.

Ingredients

Scale
  • 1 1/2 pounds fresh green beans, trimmed and cut into 1 1/2-inch pieces
  • 4 tablespoons unsalted butter
  • 1 medium yellow onion, finely chopped
  • 2 garlic cloves, minced
  • 8 ounces cremini or white mushrooms, sliced thin
  • 3 tablespoons all-purpose flour
  • 1 cup chicken broth or vegetable broth (low-sodium recommended)
  • 1 cup whole milk, warmed
  • Salt and freshly ground black pepper, to taste
  • 1 teaspoon Worcestershire sauce (optional)
  • 1 1/2 cups frozen crispy fried onions (about 45 g) or homemade crispy fried onions

Instructions

  1. Preheat your oven to 350°F (175°C).
  2. Bring a large pot of salted water to a boil. Blanch the green beans for about 5 minutes until bright green and just tender. Drain immediately and rinse under cold water to stop cooking. Set aside.
  3. In a large skillet, melt the butter over medium heat. Add the chopped onion and sauté until translucent, about 4 minutes. Add the garlic and cook for another 30 seconds until fragrant.
  4. Stir in the sliced mushrooms and cook until they release their moisture and just start to brown, about 6-8 minutes.
  5. Sprinkle the flour over the mushrooms and stir for about 1-2 minutes to cook off the raw flour taste, forming a thick paste.
  6. Slowly pour in the chicken or vegetable broth while whisking to avoid lumps, then add the warmed milk. Keep stirring until the sauce thickens and bubbles gently, about 5 minutes. Season with salt, pepper, and Worcestershire sauce if using.
  7. Fold the blanched green beans into the sauce, ensuring everything is evenly coated.
  8. Pour the mixture into a 9×13-inch (23×33 cm) baking dish and smooth the top.
  9. Sprinkle the frozen or homemade crispy fried onions evenly over the top.
  10. Bake uncovered for 25-30 minutes, until the casserole is bubbly and the onions are golden brown. Tent with foil if onions brown too quickly.
  11. Let the casserole cool for about 5 minutes before serving.

Notes

Blanch green beans properly and rinse under cold water to keep them crisp and vibrant. Use warm milk to avoid grainy sauce. Stir constantly when adding broth and milk to prevent lumps. Tent casserole with foil if onions brown too quickly. For homemade crispy fried onions, slice onions thinly, toss with flour and salt, then fry until golden and crispy.

Nutrition

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

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