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Green Bean Casserole with Mushroom Sauce and Crispy Fried Onions Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.4 from 74 reviews
  • Author: admin
  • Prep Time: 20 minutes
  • Cook Time: 40 minutes
  • Total Time: 1 hour
  • Yield: 8 servings
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American

Description

This classic Green Bean Casserole recipe features fresh green beans in a creamy mushroom sauce topped with crispy fried onions, baked to perfection. It’s a delightful, comforting side dish perfect for holiday dinners or any cozy family meal.


Ingredients

Scale

Vegetables

  • 2 pounds fresh green beans, trimmed and cut into 2-inch pieces
  • 1 medium yellow onion, finely chopped
  • 3 cloves garlic, minced
  • 8 ounces button or cremini mushrooms, sliced

Dairy & Pantry

  • 2 tablespoons unsalted butter
  • ¼ cup all-purpose flour
  • 2 cups half & half
  • 1 cup chicken or vegetable broth
  • 1 teaspoon soy sauce
  • ½ teaspoon salt
  • ½ teaspoon black pepper
  • ¼ teaspoon ground nutmeg
  • 1½ cups crispy fried onions


Instructions

  1. Preheat the Oven: Preheat your oven to 375°F (190°C) to prepare for baking the casserole later.
  2. Blanch Green Beans: Bring a large pot of salted water to a boil. Add the green beans and cook for 2-3 minutes until they are bright green and slightly tender. Immediately transfer them to a bowl of ice water to stop the cooking process. Drain and set aside.
  3. Sauté Vegetables: In a large skillet, melt the butter over medium heat. Add the chopped onion and cook for 3-4 minutes until softened. Stir in the minced garlic and sliced mushrooms, cooking for 5-7 minutes until the mushrooms release their moisture and begin to brown.
  4. Add Flour: Sprinkle the flour over the mushroom mixture and stir to coat evenly. Cook for 1-2 minutes to remove the raw flour taste.
  5. Make Sauce: Gradually whisk in the chicken or vegetable broth and half & half, stirring constantly to avoid lumps. Add soy sauce, salt, pepper, and nutmeg. Simmer for about 5 minutes, stirring often, until the sauce thickens.
  6. Combine Ingredients: In a 9×13-inch casserole dish, add the blanched green beans, mushroom sauce, and ½ cup of the crispy fried onions. Mix everything together directly in the dish until the green beans are evenly coated and spread the mixture into an even layer.
  7. Add Topping: Sprinkle the remaining crispy fried onions evenly over the top of the casserole.
  8. Bake: Bake for 20-25 minutes, or until the sauce is bubbling and the onions on top are golden brown. Let it cool for a few minutes before serving. Enjoy!

Notes

  • Blanching the green beans keeps them crisp and vibrant in color.
  • Use fresh mushrooms for best flavor, but button or cremini mushrooms both work well.
  • For a vegetarian version, use vegetable broth instead of chicken broth.
  • Make sure to cook the flour enough to avoid a raw taste in the sauce.
  • Crispy fried onions add great texture; reserve some for the topping before mixing into the casserole.