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Green Bean Casserole

A comforting and creamy green bean casserole topped with crispy fried onions, perfect for cozy weeknights and festive gatherings.
Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Course Main Course, Side Dish
Cuisine American
Servings 6 servings
Calories 300 kcal

Ingredients
  

Main Ingredients

  • 1 pound fresh green beans, trimmed and cut into 1-inch pieces Fresh gives the brightest color and snap.
  • 3 tablespoons butter Adds richness and helps build the roux.
  • 1 small onion, finely chopped For savory sweetness.
  • 2 cloves garlic, minced Aromatic lift.
  • 3 tablespoons all-purpose flour Thickens the sauce; use gluten-free flour to make it GF.
  • 1.25 cups chicken or vegetable broth Vegetable broth keeps it vegetarian-friendly.
  • 1 cup milk (whole or 2%) For a creamy texture; use unsweetened plant milk for dairy-free.
  • 1/2 cup grated Parmesan or nutritional yeast Parmesan adds umami; nutritional yeast adds cheesy flavor without dairy.
  • 1 teaspoon soy sauce or tamari Deepens the savory profile.
  • 1/2 teaspoon black pepper Balances flavor; add a pinch of nutmeg.
  • 1.5 cups crispy fried onions (store-bought or homemade) The indulgent, crunchy finish.

Instructions
 

Preparation

  • Preheat the oven to 375°F (190°C). Butter a 9×13-inch baking dish and set aside.
  • Blanch the green beans in boiling salted water for 3 minutes until bright and just tender, then plunge into ice water to stop cooking. Drain well and set aside.
  • In a medium skillet, melt butter over medium heat. Add chopped onion and cook until translucent, about 5 minutes. Stir in garlic for 30 seconds until fragrant.

Cooking

  • Sprinkle flour over the onions and garlic, stirring to create a roux. Cook for 1–2 minutes until lightly golden.
  • Gradually whisk in the broth and milk until smooth. Simmer gently until the sauce thickens — it should coat the back of a spoon.
  • Add soy sauce, Parmesan or nutritional yeast, pepper, and nutmeg. Taste and adjust seasoning.
  • Fold the blanched green beans into the sauce, then pour everything into the prepared baking dish.
  • Bake uncovered for 15 minutes until bubbling. Remove from oven, sprinkle the crispy fried onions evenly across the top, and return to the oven for 5 more minutes until the topping is golden and irresistible.

Finishing

  • Let the casserole rest for 5 minutes before serving.

Notes

Make it a make-ahead meal: assemble the casserole, cover, and refrigerate for up to 24 hours before baking. For variations, substitute ingredients based on dietary preferences.
Keyword Comfort Food, Easy Recipe, Green Bean Casserole, Holiday Recipe, Vegetarian Casserole