French Onion Green Bean Casserole – A Gourmet Twist on a Classic Favorite
French Onion Green Bean Casserole is a flavorful, creamy, and cheesy side dish that brings a touch of gourmet style to traditional comfort food. With caramelized onions, tender green beans, and a crispy topping, it’s a perfect balance of sweetness, creaminess, and crunch. Ideal for holidays or family dinners, this casserole is guaranteed to impress.
Ingredients
- 1 lb fresh green beans, trimmed and cut in half
- 2 large yellow onions, thinly sliced
- 2 tbsp butter
- 1 tbsp olive oil
- 1 cup mushrooms, sliced (optional)
- 2 cloves garlic, minced
- 1 cup beef or vegetable broth
- ½ cup heavy cream
- 1 cup shredded Gruyère or Swiss cheese
Instructions
- Preheat Oven: Set to 375°F (190°C).
- Cook Green Beans: Boil in salted water for 5 minutes until tender-crisp. Drain and set aside.
- Caramelize Onions: In a skillet, melt butter and olive oil. Add onions and cook on low heat for 20 minutes until golden brown. Add garlic and mushrooms; cook for 5 more minutes.
- Create Sauce: Sprinkle flour over onions. Stir, then add broth and cream. Simmer until thickened. Season with salt and pepper.
- Combine: Mix green beans with the onion sauce. Stir in half of the cheese.
- Bake: Transfer to a baking dish. Top with remaining cheese and crispy onions. Bake uncovered for 20 minutes until bubbly and golden.
Notes
- Use fresh green beans for the best texture and flavour.
- Caramelize onions slowly for a deep, rich taste.
- Substitute Gruyère with Swiss or mozzarella if preferred.
- For a vegetarian version, use vegetable broth.
- Great make-ahead dish—assemble and refrigerate before baking.