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Crispy Green Bean Casserole Recipe with Easy Golden Onion Topping

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A crispy green bean casserole featuring roasted green beans and a golden, buttery onion topping baked to perfection. This comforting dish balances texture, flavor, and simplicity, perfect for family gatherings and holidays.

Ingredients

Scale
  • 1.5 pounds fresh green beans, trimmed and halved
  • 2 tablespoons olive oil
  • Salt and freshly ground black pepper, to taste
  • 4 tablespoons unsalted butter, softened
  • 1 large yellow onion, thinly sliced
  • 2 tablespoons all-purpose flour
  • 2 cloves garlic, minced
  • 1 cup chicken or vegetable broth (240 ml)
  • 1 cup heavy cream (240 ml)
  • ½ cup grated Parmesan cheese (50 grams), optional
  • ¾ cup panko breadcrumbs (about 75 grams)
  • 1 teaspoon fresh thyme, chopped (or ½ teaspoon dried)

Instructions

  1. Preheat your oven to 425°F (220°C). Line a baking sheet with parchment paper or lightly grease it.
  2. Toss the trimmed and halved green beans with olive oil, salt, and pepper. Spread them in a single layer on the baking sheet. Roast for 15-18 minutes until tender but still crisp, stirring halfway through. They should have a slight caramelized edge.
  3. While the beans roast, melt the butter in a large skillet over medium heat. Add the thinly sliced onions and a pinch of salt. Cook slowly, stirring often, until the onions are soft and golden brown, about 15-20 minutes.
  4. Add minced garlic and flour to the onions. Stir for 1-2 minutes to cook off the raw flour taste, creating a roux.
  5. Slowly whisk in the broth and heavy cream, then add grated Parmesan and fresh thyme. Cook, stirring constantly, until the sauce thickens, about 4-5 minutes. Taste and adjust seasoning as needed.
  6. Combine the roasted green beans with the creamy onion sauce in a large mixing bowl. Stir gently to coat the beans evenly.
  7. Transfer the mixture to your casserole dish, spreading it out evenly.
  8. Toss the panko breadcrumbs with a little melted butter and a pinch of salt. Sprinkle this evenly over the casserole.
  9. Bake the casserole at 375°F (190°C) for 20-25 minutes, until the topping is golden and crispy, and the sauce is bubbly around the edges.
  10. Remove from the oven and let it rest for 5 minutes before serving.

Notes

For extra crispy topping, broil the casserole for 1-2 minutes at the end of baking while watching closely to avoid burning. Use fresh green beans for best texture. Slow caramelization of onions is key for deep flavor. Rest casserole 5 minutes before serving to let sauce settle. For gluten-free, substitute flour and breadcrumbs accordingly. For vegan or dairy-free, use plant-based butter, cream alternatives, and nutritional yeast instead of Parmesan.

Nutrition

Keywords: green bean casserole, crispy green beans, golden onion topping, holiday side dish, easy casserole, comfort food, Thanksgiving side

Find it online: https://yumnode.com/crispy-green-bean-casserole-recipe-with-easy-golden-onion-topping/