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gluten free green bean casserole in white dish with golden topping

Creamy Gluten Free Green Bean Casserole

Matteo
A cozy classic remade without gluten, this green bean casserole uses a rich homemade mushroom sauce and a crispy golden topping, perfect for holiday tables or weeknight sides.
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Prep Time 25 minutes
Cook Time 25 minutes
Total Time 50 minutes
Course Holiday, Side Dish
Cuisine American, Italian-American
Servings 6 servings
Calories 220 kcal

Equipment

  • large pot
  • skillet
  • mixing bowl
  • 9x13 baking dish
  • whisk
  • spatula or wooden spoon

Ingredients
  

  • 1.5 pounds fresh green beans, trimmed and halved
  • to taste salt (for blanching water)
  • 2 tbsp olive oil or butter
  • 1 medium yellow onion, finely chopped
  • 2 cloves garlic, minced
  • 8 oz mushrooms, thinly sliced (cremini or button)
  • 2 tbsp gluten-free all-purpose flour
  • 1.5 cups whole milk or unsweetened plant milk
  • 0.5 cup vegetable broth
  • 0.5 tsp black pepper
  • 0.5 tsp salt
  • 1 pinch nutmeg
  • 1 cup gluten-free panko breadcrumbs
  • 1 tbsp olive oil (for topping)
  • 0.5 tsp onion powder
  • 0.5 tsp garlic powder
  • 0.25 cup grated cheese (like parmesan or pecorino, optional)

Instructions
 

  • Bring a large pot of salted water to a boil. Add trimmed green beans and blanch for 4–5 minutes until just tender and bright green. Drain and transfer to an ice bath to stop the cooking. Set aside.
  • In a large skillet, heat olive oil over medium heat. Sauté onions for 3–4 minutes until translucent. Add garlic and cook 30 seconds. Add mushrooms and cook for 7–8 minutes until browned. Sprinkle with gluten-free flour and stir to coat. Gradually whisk in milk and broth. Simmer 5–7 minutes, stirring, until thick. Season with salt, pepper, and nutmeg.
  • In a small skillet, heat 1 tablespoon olive oil. Add panko breadcrumbs, onion powder, and garlic powder. Toast 3–4 minutes until golden. Stir in cheese off heat, if using.
  • Preheat oven to 375°F (190°C). In a large bowl, combine green beans with mushroom sauce. Transfer to a greased 9x13 baking dish. Top evenly with breadcrumb mixture.
  • Bake uncovered for 20–25 minutes until bubbling and golden. Let rest 10 minutes before serving.

Notes

Fresh green beans offer the best texture. Don't rush the roux for a smooth sauce. Make ahead by preparing the sauce and beans separately the day before. Customize the topping with nuts, dairy-free cheese, or a spicy chili oil finish.

Nutrition

Calories: 220kcalCarbohydrates: 18gProtein: 6gFat: 14gSaturated Fat: 4gPolyunsaturated Fat: 2gMonounsaturated Fat: 6gCholesterol: 10mgSodium: 400mgPotassium: 390mgFiber: 3gSugar: 5gVitamin A: 520IUVitamin C: 12mgCalcium: 140mgIron: 1.2mg
Keyword comfort food, gluten free side, green bean casserole, holiday casserole
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