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A close up of a white baking dish with green bean casserole and a serving spoon inside.
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4.98 from 146 votes

Green Bean Casserole from Scratch

Fresh Green Bean Casserole covered in french fried onions is a creamy, classic Thanksgiving side dish that nobody seems able to resist despite full plates and full bellies!
Prep Time15 minutes
Cook Time25 minutes
Total Time40 minutes
Course: Side Dish
Cuisine: American
Servings: 8 -10 servings
Calories: 260kcal
Author: Amy Nash

Ingredients

  • 2 pounds fresh green beans, rinsed and ends trimmed, then chopped in half
  • 2 Tablespoons salted butter
  • 1 medium onion, chopped
  • 2 garlic cloves, minced
  • 8 ounces baby bella or white button mushrooms, chopped (optional)
  • 1 teaspoon kosher salt
  • ½ teaspoon freshly ground black pepper
  • 2 Tablespoons all-purpose flour
  • 1 cup chicken broth
  • 1 cup half-and-half
  • ½ cup Panko bread crumbs
  • 6 ounces french fried onions

Instructions

  • Preheat the oven to 375 degrees F.  Heat a large pot of salted water to a boil.  I aim for about 1 ½ tablespoons of salt in a gallon of water, but usually just eyeball it.  Prepare a large bowl with an ice bath for blanching the beans.
  • Blanch the beans by adding them to the boiling water and cooking for 5 minutes.  Then drain in a colander and immediately plunge the beans into a large bowl of ice water.  This will stop the cooking process so the beans don't turn mushy.  Drain and set aside.
  • Melt the butter in a large skillet over medium-high heat.  Add the onion and garlic, sauteing for 4 to 5 minutes until the onions start to soften.  Add the mushrooms (if using), salt and pepper and cook another 1 to 2 minutes.
  • Sprinkle the flour over the softened onions and stir to combine.  Cook for 2 minutes, then whisk in the chicken broth to make sure there are no lumps, then the half and half.  Bring the mixture to a simmer and cook until it has thickened, stirring occasionally, about 6 minutes.
  • Pour the sauce over the beans and stir to combine, then transfer to a large 9x13-inch casserole dish and sprinkle with the breadcrumbs and french fried onions.  
  • Bake for 20 minutes until hot and bubbly.  Cover the dish with foil if the onions start to brown too quickly.  

Video

Notes

Optional:  If you want mushrooms in your green bean casserole, chop about 8 ounces of button mushrooms or 2 portobello mushrooms and add once the onions and garlic have been sauteed, before adding the flour. 

Nutrition

Calories: 260kcal | Carbohydrates: 23g | Protein: 3g | Fat: 17g | Saturated Fat: 8g | Cholesterol: 18mg | Sodium: 647mg | Potassium: 322mg | Fiber: 3g | Sugar: 4g | Vitamin A: 975IU | Vitamin C: 17.1mg | Calcium: 86mg | Iron: 1.5mg