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Green Bean Casserole Recipe

The creamy homemade mushroom sauce, cheesy layer, and crispy onion topping make this Green Bean Casserole the star of any holiday table!

Prep Time
10 mins
Cook Time
10 mins
Total Time
55 mins
Servings: 12
Calories: 199 kcal
Course: Side Dish
Cuisine: American

Ingredients

casserole
  • 1 1/2 pounds green beans ends trimmed
  • 1 1/2 tablespoons olive oil
  • 8 ounces thinly sliced shiitake mushrooms stems removed
  • 1/4 cup diced shallot (from about 1 shallot)
  • 3 thinly sliced garlic cloves
  • 6 tablespoons unsalted butter
  • 6 tablespoons flour
  • 24 ounces whole milk
  • 1 1/2 tablespoons minced thyme
  • 1 1/2 tablespoons thinly sliced chives
  • 5 tablesoons freshly grated parmesan
  • salt and pepper to taste
topping
  • 2 tablepoons salted butter
  • 1/2 cup panko breadcrumbs
  • 2 ounces shredded mozzarella
  • 1 cup crispy fried onions (such as French's)

Instructions

    Cup of Yum
  1. Preheat oven to 375˚F. Fill a large pot with water and bring to a boil. Add green beans and blanch for about 2 minutes. Strain into a colander and set aside.
  2. Place a large pan over high heat. Add oil and swirl around pan. Add mushrooms and sauté for 2 to 3 minutes, until browned on each side. Season with salt and pepper.
  3. Transfer mushrooms to a plate and set aside. Return pan back to stovetop over medium heat and melt butter. Add shallots and sauté for 2 to 3 minutes. Add garlic and continue to sauté for about 2 minutes. Season with salt and pepper.
  4. Stir flour into mixture and cook for about 2 minutes.
  5. Whisk in milk. Continue to whisk until no lumps remain and mixture thickens.
  6. Remove from heat and stir in herbs, grated Parmesan, salt, and pepper.
  7. Add mushrooms and green beans into cream sauce and fold together until everything is fully coated.
  8. Transfer mixture to a 3 quart baking dish.
  9. Tightly cover with foil. Bake for 20 minutes.
  10. Remove foil and continue to bake for an additional 15 minutes.
  11. While the casserole bakes uncovered, make the buttered panko. Place a small pan over medium heat and melt butter. Add panko and toast, stirring frequently, until breadcrumbs are lightly toasted, about 3 minutes. Remove from heat and set aside.
  12. Remove casserole from oven. Remove foil and top with a layer of shredded mozzarella.
  13. Then top with a later of buttered panko. Finish the casserole with a layer of fried onions.
  14. Bake in the oven for 10 to 12 minutes. Remove from oven and cool for about 10 minutes before serving.

Notes

  • Storing and Reheating Instructions
  • Storing Leftovers
  • If you happen to have leftovers of this casserole, store them in a covered airtight container in the refrigerator for up to 3-4 days.
  • Reheating Leftovers
  • When you're ready to reheat your leftovers, you can warm them up in the microwave or the oven (our preferred method).
  • In the microwave: Add to a microwave-safe plate and cover it loosely with paper towel. Heat for 1-2 minutes until hot and warmed through.
  • In the oven: Preheat the oven to 350°F. Place the casserole in an oven-safe container if it's not already. Cover with foil and bake for 10 to 15 minutes or until warmed through. Remove the foil and add an extra sprinkle of crispy topping. Optional- place under the broiler for a minute to crisp up the top (just be careful it doesn't burn!).

Nutrition Information

Calories 199kcal (10%) Carbohydrates 16g (5%) Protein 6g (12%) Fat 13g (20%) Saturated Fat 7g (35%) Polyunsaturated Fat 1g Monounsaturated Fat 4g Trans Fat 0.2g Cholesterol 26mg (9%) Sodium 414mg (17%) Potassium 303mg (9%) Fiber 3g (12%) Sugar 6g (12%) Vitamin A 756IU (15%) Vitamin C 9mg (10%) Calcium 133mg (13%) Iron 1mg (6%)

Nutrition Facts

Serving: 12Serving

Amount Per Serving

Calories 199

% Daily Value*

Calories 199kcal 10%
Carbohydrates 16g 5%
Protein 6g 12%
Fat 13g 20%
Saturated Fat 7g 35%
Polyunsaturated Fat 1g 6%
Monounsaturated Fat 4g 20%
Trans Fat 0.2g 10%
Cholesterol 26mg 9%
Sodium 414mg 17%
Potassium 303mg 6%
Fiber 3g 12%
Sugar 6g 12%
Vitamin A 756IU 15%
Vitamin C 9mg 10%
Calcium 133mg 13%
Iron 1mg 6%

* Percent Daily Values are based on a 2,000 calorie diet.