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Homemade Crispy Shallot Green Bean Casserole: Best Easy Recipe

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A homemade green bean casserole made from scratch with a creamy mushroom sauce and crispy fried shallots. This easy recipe comes together in under 45 minutes and is perfect for holidays, potlucks, or weeknight dinners.

Ingredients

Scale
  • 1 ½ pounds fresh green beans, trimmed and cut into 2-inch pieces
  • 1 tablespoon kosher salt (for blanching)
  • Ice water bath
  • 3 tablespoons unsalted butter
  • 8 ounces cremini mushrooms, sliced
  • 1 medium yellow onion, finely diced
  • 3 cloves garlic, minced
  • ¼ cup all-purpose flour
  • 2 cups whole milk, warmed
  • 1 cup low-sodium chicken or vegetable broth
  • 1 teaspoon fresh thyme leaves
  • ½ teaspoon freshly ground black pepper
  • ½ teaspoon salt, plus more to taste
  • ¼ teaspoon ground nutmeg
  • 4 large shallots, thinly sliced into rings (about 1 ½ cups)
  • ½ cup all-purpose flour (for shallots)
  • ½ teaspoon salt (for shallots)
  • ¼ teaspoon black pepper (for shallots)
  • Vegetable or canola oil for frying
  • ½ cup panko breadcrumbs
  • 2 tablespoons melted butter
  • ¼ cup grated Parmesan cheese (optional)

Instructions

  1. Bring a large pot of water to a rolling boil and add 1 tablespoon of kosher salt. Drop in the trimmed green beans and cook for exactly 3 minutes. While they’re boiling, prepare a large bowl of ice water. Using tongs or a slotted spoon, transfer the beans immediately to the ice bath. Let them sit for 2-3 minutes, then drain well and pat dry with a clean kitchen towel. Set aside.
  2. Pour about 2 inches of oil into a small pot and heat over medium heat to 325°F. In a shallow bowl, whisk together the flour, salt, and pepper. Toss the sliced shallots in the flour mixture, shaking off any excess. Working in batches, fry the shallots for 2-3 minutes, stirring occasionally, until golden brown and crispy. Use a slotted spoon to transfer them to a paper towel-lined plate. Sprinkle with a pinch of salt while still warm. Set aside.
  3. In a large skillet, melt the butter over medium heat. Add the sliced mushrooms and cook for 5-6 minutes, stirring occasionally, until they release their liquid and start to brown. Add the diced onion and cook for another 3-4 minutes until translucent. Stir in the minced garlic and cook for 30 seconds until fragrant. Sprinkle the flour over the vegetables and stir constantly for 1 minute. Slowly pour in the warmed milk while whisking continuously. Add the broth and continue whisking until the sau…
  4. Preheat your oven to 375°F. Lightly grease a 9×13-inch baking dish. Spread the blanched green beans evenly in the dish. Pour the mushroom sauce over the beans and gently stir to coat. In a small bowl, combine the panko breadcrumbs with the melted butter and Parmesan cheese (if using). Sprinkle this mixture evenly over the top. Bake for 20-25 minutes until the filling is bubbly and the topping is golden brown.
  5. Remove the casserole from the oven and let it rest for 5 minutes. Just before serving, scatter the crispy shallots generously over the top. Serve hot.

Notes

Don’t skip the blanching step—it sets the texture of the beans. Keep an eye on the shallots as they go from golden to burnt quickly. Warm the milk before adding to the sauce to prevent lumps. The sauce can be made up to 2 days ahead. For a gluten-free version, use a gluten-free 1:1 flour blend and gluten-free panko. For dairy-free, use olive oil or vegan butter and unsweetened oat milk or full-fat coconut milk.

Nutrition

Keywords: green bean casserole, homemade, crispy shallots, Thanksgiving, potluck, comfort food, easy recipe

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