Green bean casserole from scratch

Bright green beans in a creamy mushroom sauce you make in one skillet, under a crunchy onion lid.

  • ⏱ 1 h 16 min
  • 🍽 Serves 8
  • 📈 Medium
  • Vegetarian
  • Nut-free

Contains: gluten, milk, wheat

AI can make mistakes: always check labels.
Green bean casserole from scratch

Ingredients

  • 680 ggreen beans1½ lb, trimmed and cut in half
  • 1 tbspkosher saltmost of it for the blanching water
  • 3 tbspunsalted butter
  • 225 gcremini mushrooms8 oz, sliced
  • 2 clovesgarlicminced
  • 3 tbspall-purpose flour
  • 240 mlvegetable broth1 cup
  • 240 mlwhole milk1 cup
  • 0.25 tspblack pepper
  • 1 pinchground nutmeg (optional)
  • 1.5 cupscrispy fried onionsstore-bought (usually coated in wheat flour)

Steps

  1. 1
    Halved green beans, sliced cremini mushrooms and minced garlic sit in separate piles on a wooden cutting board.

    Prep: trim the green beans and cut them in half. Slice the mushrooms. Mince the garlic.

  2. 2
    Bright green, just-tender green beans drained in a colander.

    Heat the oven to 350°F (175°C) and butter a 2-quart baking dish. Bring a large pot of water to a boil with 2 tsp of the salt, add the green beans and cook 4 to 5 minutes, until bright green and just tender. Drain and rinse under cold water to stop the cooking.

  3. 3
    Browned cremini mushrooms with garlic in butter in a large skillet.

    Melt the butter in a large skillet over medium-high heat. Add the mushrooms and cook, stirring now and then, until they release their liquid and brown, 6 to 8 minutes. Stir in the garlic for 30 seconds.

  4. 4
    Mushrooms in a thick, creamy sauce in the skillet.

    Sprinkle the flour over the mushrooms and stir for 1 minute. Slowly whisk in the broth, then the milk, and simmer, stirring, until thick enough to coat a spoon, 4 to 5 minutes. Add the pepper, nutmeg and ½ tsp salt. Taste and adjust the salt and pepper.

    ⏱ 8 min
  5. 5
    Green beans and crispy onions folded into the creamy sauce, spread in a baking dish.

    Stir in the green beans and half the fried onions, then spread everything in the baking dish.

    💡 You can make it up to this point a day ahead and refrigerate it; add 10 minutes to the bake.

  6. 6
    Bubbling green bean casserole topped with golden crispy fried onions.

    Bake for 25 minutes, until bubbling at the edges. Scatter the rest of the fried onions over the top and bake 5 minutes more, until golden.

    ⏱ 30 min

    💡 Reheat leftovers until hot all the way through, 165°F (74°C) on an instant-read thermometer.

Make it easier

Frozen-bean green bean casserole

  • Use 2 lb frozen cut green beans, thawed and patted dry, and skip boiling.
  • Make the sauce and bake as written.

Dietary versions

Swaps checked for this recipe. In the app, Jude makes them for you once he knows your diet and allergies.

AI can make mistakes: always check labels.
Milk allergy
Instead of unsalted butter: olive oil or plant butter
Instead of whole milk: unsweetened oat milk or unsweetened soy milk
Dairy-free
Instead of unsalted butter: olive oil or plant butter
Instead of whole milk: unsweetened oat milk or unsweetened soy milk
Vegan
Instead of unsalted butter: olive oil or plant butter
Instead of whole milk: unsweetened oat milk or unsweetened soy milk
Wheat allergy
Instead of all-purpose flour: 2 tbsp cornstarch whisked into the cold milkSkip cooking flour with the mushrooms; add the slurry with the broth.
Instead of crispy fried onions: gluten-free crispy onions or thinly sliced shallots fried in oil until goldenStore-bought fried onions are usually coated in wheat flour; check the label.
Gluten-free
Instead of all-purpose flour: 2 tbsp cornstarch whisked into the cold milkSkip cooking flour with the mushrooms; add the slurry with the broth.
Instead of crispy fried onions: gluten-free crispy onions or thinly sliced shallots fried in oil until goldenStore-bought fried onions are usually coated in wheat flour; check the label.

Next time: Next time, add a splash of soy sauce to the sauce for depth, or top with grated Parmesan along with the onions.

A lighter plate: Use 2% milk and only ¾ cup fried onions, all on top; the beans carry the dish.

Per serving (estimate): 160 kcal · 4 g protein · 3 g fiber · 520 mg sodium

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