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Healthier Green Bean Casserole

Image for Healthier Green Bean Casserole


Serves 8


Prep Time

20 minutes


Cook Time

1 hour, 11 minutes


Total Time

1 hour, 31 minutes

kikkoman products used:


8 cups water
1 teaspoon sea salt, divided
2 pounds green beans, tough ends trimmed
Gluten-free cooking spray
2 tablespoons olive oil
2 cups sweet white onions, thinly sliced
6 tablespoons unsalted butter, divided
10 ounces white button mushrooms, sliced
2 teaspoons garlic, minced
1 teaspoon dried thyme
2 tablespoons gluten-free all-purpose flour
2 cups unsweetened almond milk
2 tablespoons Kikkoman® Gluten-Free Tamari Soy Sauce
¼ teaspoon cracked black pepper
Pinch of nutmeg


For topping:
2 tablespoons unsalted butter, melted
1 cup Kikkoman® Gluten-Free Panko Bread Crumbs


  1. Preheat oven to 375ºF. Bring 8 cups of water to a rolling boil in a large stock pot and season with ½ teaspoon of sea salt. Add green beans. Boil for 3-4 minutes. Drain and blot beans dry with a clean kitchen towel. Spread beans evenly in a medium casserole dish greased with cooking spray.
  2. Heat olive oil over medium heat in a large skillet. Add onions and cook for 10 minutes, stirring regularly. Melt 2 tablespoons of butter in pan and add sliced mushrooms. Stir well and cook 10 minutes longer. Remove from heat and discard any excess liquid from the pan. Stir in garlic, thyme and ½ teaspoon of sea salt and cook for 2 minutes longer.
  3. Sprinkle onion and mushroom mixture over green beans.
  4. Melt remaining 2 tablespoons of butter in pan and sprinkle in flour, whisking to combine. Gradually add almond milk and tamari until thoroughly mixed. Add black pepper and nutmeg. Continue to heat until mixture has thickened, about 5-7 minutes. Pour sauce over green beans evenly. Cover casserole tightly with aluminum foil and bake for 35 minutes.
  5. Microwave 2 tablespoons of butter in a heat safe bowl. Add panko bread crumbs and stir to coat. Remove casserole from oven and discard foil. Increase oven temperature to 425ºF. Sprinkle panko over casserole and bake for 12-15 minutes longer, until panko is golden brown. Remove from oven and cool for 5 minutes before serving.


Even people who love soy sauce and use it all the time are often surprised to learn what it is and how it’s made. We make ours from just four simple ingredients—water, soybeans, wheat, and salt. Those ingredients are transformed through a traditional brewing process—much like making wine or beer—that has remained unchanged for centuries.


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