Bechamel Green Bean Casserole Recipe

Elevate your holiday table with this irresistible Creamy Bechamel Green Bean Casserole! Fresh green beans and sautéed mushrooms mingle in a luscious, homemade béchamel sauce, then baked to golden perfection with crispy breadcrumbs. This family-favorite side dish is surprisingly easy to make and guaranteed to impress. Ditch the canned stuff and experience the ultimate green bean casserole!

Prep Time 20 mins
Cook Time 50 mins
Calories 144.2 kcal
Protein 11g
Rating 4.9 (8 Reviews)
Bechamel Green Bean Casserole 100

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Recipe Author

Chef Forktionary, author of this recipe

Recipe adapted from Food.com. Standardized by Forktionary.

Ingredients for Bechamel Green Bean Casserole

  • 4 tablespoons (1/2 stick) butter
  • 1/4 cup all-purpose flour
  • 2 cups milk
  • 1 tablespoon ranch dressing mix
  • 1/4 teaspoon white pepper
  • 1/2 cup chopped onion
  • 2 cloves minced garlic
  • 8 ounces sliced fresh mushrooms
  • 1 pound fresh green beans
  • 1/2 cup soft breadcrumbs
  • 1 teaspoon salt
  • 1 tablespoon olive oil
  • non-stick cooking spray

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How to Make Bechamel Green Bean Casserole

  1. Wash and trim 1 pound of fresh green beans. Boil in a pot of lightly salted water (about 1 teaspoon salt) for 8-10 minutes, or until crisp-tender. Drain and set aside.
  2. Melt 4 tablespoons (1/2 stick) of butter in a medium saucepan over low heat.
  3. Whisk in 1/4 cup all-purpose flour and cook for 1-2 minutes, stirring constantly, until smooth.
  4. Gradually whisk in 2 cups of milk until smooth. Bring to a simmer, whisking constantly, until the sauce thickens (about 1-2 minutes).
  5. Remove from heat and stir in 1/4 teaspoon white pepper and 1 tablespoon of your favorite dry soup mix (e.g., French onion, mushroom). Set aside.
  6. Preheat oven to 350°F (175°C). Lightly spray a 1 1/2-quart casserole dish with non-stick cooking spray.
  7. Heat 1 tablespoon olive oil in a medium skillet over medium-high heat.
  8. Add 1/2 cup chopped onion and 2 cloves minced garlic. Cook and stir for 2-3 minutes, until softened.
  9. Remove half of the onion mixture and set aside for topping.
  10. Add 8 ounces of sliced mushrooms to the skillet and cook for 5 minutes, or until tender.
  11. Combine the cooked green beans, mushroom mixture, and béchamel sauce in the prepared casserole dish.
  12. Combine the reserved onion mixture with 1/2 cup breadcrumbs. Sprinkle over the casserole.
  13. Bake, uncovered, for 20-30 minutes, or until heated through and bubbly. Let stand for 5 minutes before serving.

Nutrition Information (Approximate per serving)

Sodium

4 g

Sugar

12g

Fat

16g

Carbs

6g

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