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Amazing Garlic Parmesan Green Bean Casserole Recipe

4.5 from 126 reviews

This Amazing Garlic Parmesan Green Bean Casserole is a delicious twist on the classic holiday side dish, combining crisp-tender green beans with a creamy garlic Parmesan sauce, topped with crispy fried onions for the perfect crunch. It’s an easy, comforting casserole that makes any dinner special.

Ingredients

Scale

Green Beans

  • 1.5 lbs fresh green beans, trimmed

Sauce

  • 4 tbsp butter
  • 1 small yellow onion, chopped
  • 2 cloves garlic, minced
  • 3 tbsp all-purpose flour
  • 2 cups milk
  • 1/2 cup grated Parmesan cheese
  • 1/4 tsp salt
  • 1/4 tsp black pepper

Topping

  • 1 (6 oz) can crispy fried onions, divided

Instructions

  1. Preheat Oven: Preheat your oven to 350°F (175°C) to prepare for baking the casserole.
  2. Cook Green Beans: Steam or boil the green beans until they are crisp-tender, which should take about 5-7 minutes. Drain them thoroughly and set aside.
  3. Sauté Aromatics: In a large skillet, melt the butter over medium heat. Add the chopped onion and cook until softened, about 5 minutes. Then add the minced garlic and cook for an additional 1 minute to release its flavor.
  4. Make Sauce: Stir in the flour with the onion and garlic mixture, cooking it until smooth. Gradually whisk in the milk to avoid lumps. Bring the mixture to a simmer while stirring constantly.
  5. Thicken Sauce: Reduce the heat and let the sauce simmer for 2-3 minutes, stirring often, until it thickens. Stir in the grated Parmesan cheese, salt, and black pepper to complete the sauce.
  6. Combine Green Beans and Sauce: Add the cooked green beans to the sauce and toss gently to coat everything evenly.
  7. Assemble Casserole: Transfer the green bean mixture into a 9×13 inch baking dish. Sprinkle half of the crispy fried onions evenly on top.
  8. Bake: Bake the casserole in the preheated oven for 20-25 minutes, or until it’s heated through and bubbling.
  9. Top and Finish Baking: Sprinkle the remaining crispy fried onions over the top of the casserole, then bake for an additional 5 minutes until the onions are golden brown and crispy.
  10. Serve: Remove from the oven and let the casserole stand for a few minutes before serving to allow it to set slightly. Enjoy hot.

Notes

  • For an extra layer of flavor, add a pinch of nutmeg to the sauce while it simmers.
  • Ensure green beans are well-drained to avoid a watery casserole.
  • This casserole can be prepared a day ahead and reheated before serving.
  • Use fresh Parmesan cheese for the best flavor and texture.

Keywords: green bean casserole, garlic Parmesan green beans, holiday side dish, creamy green beans, crispy fried onions, easy casserole