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The World's Best Old Fashioned Green Bean Casserole Recipe: A Southern Thanksgiving Tradition

This Southern-style green bean casserole elevates the traditional favorite with a homemade creamy sauce, fresh green beans, and irresistible crispy onion topping. The mushroom-free version allows the natural sweetness of green beans to shine, making it perfect for Thanksgiving gatherings.
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Prep Time 20 minutes
Cook Time 35 minutes
Total Time 55 minutes
Servings: 8 servings
Calories: 385
Ingredients Method Notes

Ingredients
  

Ingredients
  • 2 pounds fresh green beans, trimmed and cut into 2-inch pieces
  • 4 tablespoons unsalted butter
  • 1 medium yellow onion, finely chopped
  • 3 cloves garlic, minced
  • ¼ cup all-purpose flour
  • 2 cups whole milk
  • 1 cup heavy cream
  • 1 cup shredded sharp cheddar cheese
  • ½ cup grated Parmesan cheese
  • 1 teaspoon salt
  • ½ teaspoon black pepper
  • ½ teaspoon paprika
  • ¼ teaspoon nutmeg
  • 2 cups crispy fried onions (for topping)

Method
 

Instructions
  1. Bring a large pot of salted water to boil. Blanch the green beans for 4-5 minutes until bright green and slightly tender. Immediately transfer to an ice bath to stop the cooking process, then drain thoroughly.
  2. In a large saucepan, melt butter over medium heat. Add chopped onion and cook until softened (about 5 minutes). Add garlic and cook for another minute. Sprinkle flour over the mixture and whisk constantly for 1 minute to create a roux.
  3. Gradually whisk in milk and heavy cream until smooth. Bring to a simmer, then reduce heat and cook for 5-7 minutes until thickened. Remove from heat and stir in cheddar and Parmesan cheeses until melted. Season with salt, pepper, paprika, and nutmeg.
  4. Preheat oven to 350°F. Combine the blanched green beans with the cream sauce in a large bowl, then transfer to a 9x13 inch baking dish. Spread evenly and top with crispy fried onions.
  5. Bake for 25-30 minutes until bubbly and golden brown on top. Let stand for 5 minutes before serving to allow the sauce to set.

Notes

Fresh green beans work best, but frozen can be used if thawed and drained. Add fried onions during last 10 minutes for extra crispiness. Casserole can be assembled without topping up to 24 hours in advance. Add cayenne pepper or Worcestershire sauce for extra flavor.