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The Best Homemade Healthy Green Bean Casserole

A lightened-up, from-scratch green bean casserole made with fresh green beans, a creamy mushroom sauce, and a healthier crispy onion topping.
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Prep Time 15 minutes
Cook Time 22 minutes
Total Time 37 minutes
Servings: 6 servings
Course: Holiday, Side Dish
Cuisine: American
Calories: 155

Ingredients
  

Casserole
  • 1.5 lbs fresh green beans trimmed and halved
  • 1 tbsp olive oil
  • 1 onion diced
  • 3 cups mushrooms sliced
  • 3 cloves garlic minced
  • 2 tbsp flour
  • 1 cup broth low-sodium
  • 1 cup Greek yogurt plain
  • 0.5 cup Parmesan cheese grated
  • 0.5 tsp salt
  • 0.5 tsp black pepper
  • 0.5 tsp smoked paprika optional
Healthy Crispy Onion Topping
  • 1 onion thinly sliced
  • 1 tbsp olive oil
  • 0.25 cup whole-wheat breadcrumbs
  • 0.25 cup Parmesan cheese
  • salt and pepper to taste

Equipment

  • Large pot
  • Skillet
  • Whisk
  • Baking dish

Method
 

  1. Preheat oven to 375°F (190°C).
  2. Blanch green beans in boiling salted water for 3–4 minutes, then transfer to ice bath.
  3. Heat olive oil in a skillet. Sauté diced onion and mushrooms until softened, then add garlic.
  4. Add flour and stir. Slowly pour in broth while whisking. Simmer until thickened.
  5. Remove from heat and stir in Greek yogurt, Parmesan, salt, pepper, and paprika.
  6. Fold in green beans and transfer to a baking dish.
  7. For topping: sauté sliced onions in olive oil until golden. Add breadcrumbs, Parmesan, salt, and pepper. Toast until crisp.
  8. Sprinkle topping over casserole and bake 18–22 minutes until bubbly.
  9. Rest 5 minutes before serving.

Notes

Use gluten-free flour if needed. Add more yogurt for extra creaminess.