Creamy Green Bean Casserole with Mushrooms, Fried Onions, and Parmesan Recipe
This classic Green Bean Casserole recipe features fresh green beans tossed in a creamy mushroom sauce, topped with crispy fried onions and a golden parmesan-panko crust. It’s a comforting and flavorful side dish perfect for holidays or any family meal.
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Total Time: 55 minutes
- Yield: 6 servings 1x
- Category: Side Dish
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Ingredients
Scale
Vegetables and Fresh Ingredients
- 1 lb fresh green beans, rinsed, trimmed, and halved
- 8 ounces cremini or white mushrooms, sliced
- 3 garlic cloves, minced
Dairy & Butter
- 3 tablespoons unsalted butter, divided
- 1 cup heavy cream
- 1/4 cup parmesan cheese, finely grated
Pantry Staples
- 1/2 teaspoon kosher salt
- 1/4 teaspoon pepper
- 2 tablespoons flour
- 1 cup vegetable or chicken broth
- 2 cups fried onions, divided
- 1/4 cup panko bread crumbs
Instructions
- Prepare the green beans: Rinse, trim, and halve the fresh green beans, then set them aside to use in the casserole.
- Sauté the mushrooms: In a large skillet, melt 2 tablespoons of unsalted butter over medium heat. Add the sliced mushrooms along with kosher salt, pepper, and minced garlic. Cook until mushrooms are tender and most of their moisture has evaporated, about 5-7 minutes.
- Make the roux and sauce: Sprinkle 2 tablespoons of flour over the mushroom mixture and stir well to coat. Cook for 1-2 minutes to eliminate raw flour taste. Gradually whisk in 1 cup of vegetable or chicken broth, then add 1 cup of heavy cream. Continue stirring until the sauce thickens and becomes creamy, about 4-5 minutes.
- Combine green beans and sauce: Add the prepared green beans to the skillet and stir to coat them evenly with the creamy mushroom sauce.
- Preheat oven and prepare topping: Preheat your oven to 350°F (175°C). In a small bowl, mix the remaining 1 tablespoon of melted butter with panko bread crumbs, grated parmesan cheese, and 1 cup of fried onions.
- Assemble the casserole: Transfer the green bean mixture into a baking dish. Evenly sprinkle the panko, parmesan, and fried onion mixture on top, followed by the remaining 1 cup of fried onions to add an extra crispy layer.
- Bake the casserole: Place the casserole in the preheated oven and bake for 25-30 minutes, or until the topping is golden brown and the casserole is bubbly.
- Serve: Remove from the oven and let it cool slightly before serving for the best texture and flavor.
Notes
- Use fresh green beans rather than canned or frozen for the best texture and flavor.
- You can substitute vegetable broth with chicken broth depending on dietary preferences.
- Fried onions can be found pre-made in most grocery stores, or you can make your own for extra crispness.
- This dish can be prepared ahead of time and baked just before serving.
- For a lighter version, use half-and-half instead of heavy cream, but the sauce may be less rich.
Keywords: green bean casserole, holiday side dish, creamy green beans, mushroom casserole, vegetarian casserole