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One-Pan Creamy Garlic Soy Green Bean and Mushroom Casserole – Healthyish Foods

Creamy Green Bean Casserole

This one pan, creamy green bean casserole recipe is absolutely delicious. It takes traditional green bean casserole to the next level with homemade creamy garlic soy sauce.
5 from 2 votes
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Garlic Soy Sauce

  • ¼ cup butter, salted, 4 tablespoons
  • 2 tablespoons AP flour, all purpose flour
  • 1 tablespoon garlic, chopped small or minced about 3 cloves.
  • 1 cup 2% milk
  • ½ cup chicken broth
  • ½ teaspoon salt
  • ¼ teaspoon black pepper
  • 2-3 tablespoons soy sauce, regular


  • 12 ounces fresh green beans , rinse and dry the beans. make sure to remove the stems. Cut them in half if they are very long.
  • 16 ounces baby bella mushrooms, rinse, dry and slice the mushrooms
  • ½ cup crispy fried onions


  • 9 inch cast-iron skillet


  • Preheat the oven to 350 degrees.
  • Grab a 9-inch cast iron skillet.
  • Over medium heat, add the butter, minced garlic, and flour. Stir until a roux begins to form. All of the butter will be melted, and you will see the flour and butter begin to bubble.
  • Once it begins to bubble, slowly add your milk. As you add the milk, a creamy sauce will begin to form. Once all the milk is added, repeat the same process for the chicken broth.
  • Once the chicken broth is well incorporated, add the soy sauce. Stir until well combined.
  • Next, you will add the rinsed and dried bella mushrooms. Let them simmer in the sauce over medium / low heat.
  • As the sauce and mushrooms begin to reduce and soften, add the prepared green beans. Season everything with the salt. Stir well.
  • Let everything simmer over medium/low heat for 5-10 minutes.
  • Next, you will sprinkle crispy fried onions over the top of the dish.
  • Then, you will cover the dish with foil and bake it for 20 minutes at 350 degrees.
  • Remove the foil and bake for an additional 5 minutes.
  • Remove from the oven and serve warm.


Serving: 1serving, Calories: 261kcal, Carbohydrates: 22g, Protein: 9g, Fat: 17g, Saturated Fat: 10g, Polyunsaturated Fat: 1g, Monounsaturated Fat: 4g, Trans Fat: 1g, Cholesterol: 35mg, Sodium: 1403mg, Potassium: 845mg, Fiber: 3g, Sugar: 8g, Vitamin A: 1002IU, Vitamin C: 13mg, Calcium: 142mg, Iron: 2mg