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Fresh Green Bean Casserole

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A from-scratch green bean casserole featuring crisp-tender green beans in a creamy homemade mushroom sauce, topped with golden, crispy fried onions for a vibrant and flavorful side dish.

  • Author: Sophia
  • Prep Time: 25 minutes
  • Cook Time: 40 minutes
  • Total Time: 1 hour 5 minutes
  • Yield: 6–8 servings
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Ingredients

  • 1½ pounds fresh green beans, trimmed and halved
  • 1 teaspoon kosher salt (for blanching water)
  • 1 medium yellow onion, very thinly sliced
  • 1 cup all-purpose flour (for onion coating)
  • 1/2 teaspoon garlic powder
  • 1/2 teaspoon paprika
  • 1/2 teaspoon kosher salt
  • 1/4 teaspoon black pepper
  • 1 cup buttermilk
  • Neutral oil for frying (vegetable or sunflower), 1–2 inches deep
  • 4 tablespoons butter
  • 6 ounces mushrooms, sliced (cremini or button)
  • 3 cloves garlic, minced
  • 4 tablespoons all-purpose flour (for sauce)
  • 1 cup low-sodium chicken or vegetable broth
  • 1 cup half-and-half
  • 1 teaspoon fresh thyme leaves, minced
  • 1/2 teaspoon kosher salt (for sauce)
  • 1/2 teaspoon black pepper (for sauce)

Instructions

  1. Preheat oven to 350°F (175°C). Grease a 9×13-inch baking dish.
  2. Bring a large pot of salted water to a boil. Blanch green beans 5–6 minutes until bright green and crisp-tender. Drain and transfer to ice bath. Drain thoroughly and pat dry.
  3. Soak sliced onion in buttermilk for several minutes. In a separate dish, combine flour, garlic powder, paprika, salt, and pepper.
  4. Heat 1–2 inches of neutral oil to 350°F. Dredge onions in seasoned flour and fry in batches 2–3 minutes until golden and crisp. Drain on paper towels and lightly season with salt.
  5. In a skillet, melt butter over medium heat. Sauté mushrooms and garlic 6–8 minutes until mushrooms release moisture and begin to brown.
  6. Sprinkle mushrooms with 4 tablespoons flour, stir 1 minute. Gradually whisk in broth, then add half-and-half, thyme, salt, and pepper. Simmer 3–4 minutes until thickened.
  7. Fold green beans into mushroom sauce and transfer to prepared baking dish. Smooth surface and sprinkle crispy fried onions on top.
  8. Bake uncovered 20–25 minutes until hot and bubbling. Let rest 10 minutes before serving.

Notes

  • Vegetarian version: Use vegetable broth instead of chicken broth.
  • Increase mushrooms to 12 ounces for a stronger mushroom flavor.
  • Double sauce ingredients for a creamier casserole.
  • Shortcut: Use store-bought fried onions instead of homemade.
  • Frozen green beans can be used; thaw and dry thoroughly before adding to sauce.
  • Store leftovers covered in the refrigerator up to 3–4 days. Reheat in microwave or 350°F oven, adding extra fried onions if desired.
  • Freezing is not recommended; sauce may separate and beans may become mushy.

Nutrition

Find it online: https://savorymomskitchen.com/fresh-green-bean-casserole/