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Crispy Church Potluck Green Bean Casserole Recipe with Fried Onions for the Perfect Holiday Side

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A crispy and creamy green bean casserole topped with homemade fried onions, perfect for holiday gatherings and potlucks. This recipe balances textures and flavors for a comforting and crowd-pleasing side dish.

Ingredients

Scale
  • 1½ pounds fresh green beans, trimmed and blanched (or 2 cans cut green beans, drained for shortcut)
  • 4 tablespoons unsalted butter, divided
  • ¼ cup all-purpose flour (for thickening the mushroom sauce)
  • 8 ounces cremini or white mushrooms, finely chopped
  • 1 small yellow onion, finely diced
  • 2 cloves garlic, minced
  • 1½ cups whole milk, warmed
  • 1 teaspoon Worcestershire sauce (optional)
  • Salt and pepper to taste
  • 1½ cups homemade fried onions or high-quality store-bought crispy onions
  • Olive oil for frying onions
  • ½ cup all-purpose flour (for coating the onions before frying)
  • 1 large egg, beaten

Instructions

  1. Bring a large pot of salted water to a boil. Add the trimmed green beans and cook for 3-4 minutes until bright green and just tender. Immediately transfer to an ice bath to stop cooking. Drain and set aside.
  2. Slice 2 medium onions thinly into rings. Separate the rings and place them in a bowl with ½ cup all-purpose flour. Toss to coat evenly.
  3. Dip the floured onions into the beaten egg, then back into the flour for a second coating.
  4. Heat about 1 inch of oil in a skillet to 350°F (175°C). Fry the onions in batches for 2-3 minutes or until golden brown. Use a slotted spoon to transfer them to a paper-towel-lined plate. Set aside.
  5. In a large skillet, melt 2 tablespoons butter over medium heat. Add the diced onion and cook until translucent, about 3 minutes. Add minced garlic and chopped mushrooms; sauté until mushrooms release moisture and begin to brown, about 5-7 minutes.
  6. Sprinkle ¼ cup flour over the mushroom mixture and stir well for 1-2 minutes. Slowly whisk in the warmed milk to avoid lumps. Add Worcestershire sauce, salt, and pepper. Cook, stirring frequently, until sauce thickens, about 5 minutes.
  7. In a large mixing bowl, toss the blanched green beans with the mushroom sauce until evenly coated.
  8. Pour the green bean mixture into a greased 9×13-inch baking dish. Spread evenly. Sprinkle about half of the fried onions over the top.
  9. Preheat oven to 350°F (175°C). Bake the casserole uncovered for 25 minutes until bubbling.
  10. Remove casserole from oven and top with remaining fried onions. Return to oven and bake for an additional 5-7 minutes to crisp up the topping.
  11. Let the casserole rest for 5 minutes before serving.

Notes

For gluten-free, substitute all-purpose flour with almond flour or gluten-free blend. You can also bake onions instead of frying for a healthier option. To keep fried onions crispy, add the last layer just before serving. Use a thermometer to keep oil at 350°F for best frying results. Leftovers can be reheated in the oven to restore crispiness.

Nutrition

Keywords: green bean casserole, fried onions, holiday side dish, church potluck, crispy topping, mushroom sauce, comfort food

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