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Best Green Bean Casserole from Scratch


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  • Author: Mia
  • Total Time: 45 minutes
  • Yield: 6 servings

Description

This homemade green bean casserole is made with fresh green beans, creamy mushroom sauce, and topped with crispy onions. A must-have Thanksgiving side made completely from scratch!


Ingredients

1 lb fresh or frozen green beans

3 tablespoons butter

½ medium onion, chopped

10 oz fresh sliced mushrooms (cleaned)

½ teaspoon garlic powder

Salt and pepper, to taste

⅓ cup all-purpose flour

½ cup half and half

1½ cups whole milk

1 cup French’s Crispy Fried Onions


Instructions

Preheat oven to 350°F (176°C).

Cook the green beans in boiling water for 10 minutes. Drain and set aside.

Make the mushroom sauce: In a large skillet over medium heat, melt the butter. Add chopped onions, mushrooms, garlic powder, salt, and pepper. Sauté for about 5 minutes until softened.

Build the sauce: Sift in the flour a little at a time, alternating with splashes of milk and half and half. Stir constantly to prevent lumps. Continue until all flour and liquids are incorporated and a creamy sauce has formed.

Combine: Remove sauce from heat, stir in the cooked green beans, and transfer the mixture to a 7″x3″x11″ baking dish.

Bake: Bake uncovered for 30 minutes.

Add topping: Sprinkle crispy fried onions over the top and return to the oven for an additional 5 minutes until golden and crispy.

Serve warm as a comforting and flavorful holiday side.

Notes

Do not add flour all at once—gradually add with the milk to avoid a pasty sauce.

Storage: Keep covered in the fridge for up to 5 days or freeze for up to 6 months.

Reheating: Warm in a 350°F oven until heated through for best texture.

  • Prep Time: 5 minutes
  • Cook Time: 40 minutes
  • Category: Side Dish
  • Method: Baked, Stovetop
  • Cuisine: American