Go Back
Easy Thanksgiving Green Bean Casserole topped with crispy fried onions and homemade sauce.

Easy Thanksgiving Green Bean Casserole

A cozy, homemade green bean casserole made with fresh ingredients, creamy sauce, and a crispy topping, perfect for Thanksgiving.
Print Recipe Pin Recipe
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 8 servings
Course: Side Dish, Thanksgiving
Cuisine: American
Calories: 250
Ingredients Method Notes

Ingredients
  

For the Casserole
  • 1 pound Fresh green beans, trimmed and cut in halves Frozen green beans can also be used, thawed and pat dried.
  • 2 tablespoons Butter For sautéing the onions and mushrooms.
  • 1 medium Onion, finely chopped Shallot can be used for a milder taste.
  • 2 cloves Garlic, minced Optional, but adds flavor.
  • 8 ounces Mushrooms, sliced Fresh mushrooms are preferred for the best flavor.
  • 2 tablespoons Flour For thickening the sauce.
  • 1 cup Milk Add a splash of cream for extra richness if desired.
  • 0.5 teaspoon Salt Adjust to taste.
  • 0.5 teaspoon Black pepper Adjust to taste.
  • 1 tablespoon Soy sauce or Worcestershire sauce For deeper flavor.
  • 1.5 cups French fried onions For topping.

Method
 

Preparation
  1. Bring a large pot of salted water to a boil. Add the trimmed green beans and cook until bright green and just tender, about 4 to 6 minutes. Drain and rinse quickly with cool water.
Sauce Preparation
  1. In a large skillet, melt the butter over medium heat. Add the onion and cook until soft.
  2. Add the mushrooms and cook until they release liquid and start to brown.
  3. Sprinkle the flour over the mixture and stir for about a minute. Gradually pour in the milk while stirring and let it bubble gently until it thickens.
  4. Season the sauce with salt, black pepper, and soy sauce or Worcestershire.
Assembly
  1. Add the cooked green beans to the sauce and stir to coat. Pour the mixture into a baking dish and top with French fried onions.
Baking
  1. Bake in a preheated oven at 350°F (175°C) until hot and bubbly, about 20 to 25 minutes. For extra crispy onions, reserve some to add in the last 5 minutes of baking.

Notes

You can prepare this casserole in advance by assembling it (without the onions) and refrigerating it. Bake covered for the first 15 minutes before adding onions on top.