If you love cozy, comforting dishes that bring together bold flavors and satisfying textures, you’re going to adore this Cheesy Mushroom and Onion Green Bean Casserole Recipe. It’s a delightful twist on a classic comfort food favorite, loaded with tender green beans, rich sautéed mushrooms and onions, creamy mushroom soup, and just the right kick of spicy pepper jack cheese. Every forkful offers a perfect balance of creamy, crunchy, and savory that’s impossible not to smile at. Whether you’re looking for a standout side for a holiday feast or a delicious way to elevate your weeknight dinners, this casserole will quickly become your go-to dish.
Ingredients You’ll Need
This recipe comes together effortlessly thank to a handful of simple yet essential ingredients. Each one plays a unique role: from the creaminess of the soup base to the fresh bite of green beans and the irresistible melt and spice of pepper jack cheese, these components work beautifully to create the ultimate comfort casserole.
- Campbell’s® Condensed Cream of Mushroom Soup: Provides a creamy, savory base that carries all the flavors.
- Milk: Lightens the soup mixture and helps it blend smoothly with the vegetables.
- Ground black pepper: Adds a subtle warmth that complements the mushrooms.
- Salt: Enhances all the tastes in the casserole without overpowering.
- Butter and olive oil: For perfectly sautéed onions and mushrooms, adding richness and depth.
- Sweet onion: Thinly sliced for a mild, caramelizing sweetness.
- Mushrooms: Sliced to bring earthy flavor and tender texture.
- Del Monte® Green Beans: Drained cans are used for convenience and vibrant green color.
- Pepper jack cheese: Shredded and divided, it melts into creaminess with a gentle spicy bite.
- French’s® Crispy Fried Onions: The final crunchy topping that adds flavor and texture contrast.
How to Make Cheesy Mushroom and Onion Green Bean Casserole Recipe
Step 1: Prepare the Soup Mixture
Start by stirring together Campbell’s® Condensed Cream of Mushroom Soup, milk, ground black pepper, and salt in a large bowl until smooth. This creamy foundation is what brings everything together, ensuring each bite is irresistibly rich and flavorful.
Step 2: Sauté the Vegetables
Warm butter and olive oil in a sauté pan over medium heat. Add the thinly sliced sweet onions and mushrooms, cooking them until they turn tender, soft, and beautifully golden brown. This step unlocks their natural sweetness and deepens the flavor, elevating the entire dish.
Step 3: Combine All Ingredients
Mix the drained green beans, sautéed onions, and mushrooms into the soup mixture bowl. Stir gently so everything is evenly coated in that luscious mushroom cream sauce—this guarantees a consistent flavor burst in every bite.
Step 4: Add the Cheese
Fold in 1 cup of shredded pepper jack cheese. This cheese brings a creamy texture and a delightfully mild kick to the casserole, melding perfectly with the savory vegetables and soup base.
Step 5: Assemble and Bake the Casserole
Transfer the mixture to a 3-quart casserole dish, smoothing it out evenly. Bake uncovered at 350°F (175°C) for about 25 minutes until the casserole is hot, bubbling, and the flavors have started to meld beautifully.
Step 6: Top and Finish Baking
Gently stir the casserole, then sprinkle the top with crispy fried onions and the remaining 1/4 cup of shredded pepper jack cheese. Pop it back into the oven for an extra 5 minutes to let the topping crisp to a golden brown that adds irresistible texture and flavor contrast.
How to Serve Cheesy Mushroom and Onion Green Bean Casserole Recipe
Garnishes
For an extra pop of color and freshness, sprinkle some chopped fresh parsley or chives on top right before serving. Not only do they brighten the rich casserole, but they also add a subtle herbal note that balances the creamy, cheesy flavors.
Side Dishes
This casserole pairs wonderfully with roasted meats like turkey, chicken, or pork. It’s also fantastic alongside mashed potatoes or fluffy rice to round out your meal with hearty, comforting sides.
Creative Ways to Present
Serve the casserole in individual ramekins for a charming, personalized touch at the dinner table. Alternatively, layer the mixture with crispy fried onions between layers for an exciting, crunchy surprise every few bites.
Make Ahead and Storage
Storing Leftovers
Once cooled to room temperature, store leftover Cheesy Mushroom and Onion Green Bean Casserole Recipe in an airtight container in the refrigerator. It will keep beautifully for up to 3 days, making it an excellent option for meal planning.
Freezing
This casserole freezes well if you want to prep it in advance. After assembling, wrap tightly with foil and freeze for up to 2 months. When ready to enjoy, thaw overnight in the fridge before baking as directed.
Reheating
Reheat leftovers in a 350°F (175°C) oven until warmed through and bubbling, about 15-20 minutes. This method helps maintain the casserole’s crisp topping and creamy interior far better than microwaving.
FAQs
Can I use fresh green beans instead of canned?
Absolutely! Fresh green beans will add a crisp texture and bright flavor. Just blanch them briefly in boiling water before using to ensure they cook evenly in the casserole.
What can I substitute for pepper jack cheese?
If you prefer milder cheese, Monterey Jack or mozzarella work beautifully. For a sharper bite, try cheddar—each will bring its own character to the dish.
Is this casserole gluten-free?
The base ingredients are gluten-free, but the crispy fried onions typically contain wheat. Look for gluten-free fried onion alternatives or make your own to keep it fully gluten-free.
Can I make this recipe vegetarian?
Yes. As long as the soup you use is vegetarian-friendly and you skip any meat additions, this casserole is a delicious vegetarian option packed with veggies and cheese.
How spicy is the pepper jack cheese in this recipe?
Pepper jack cheese offers a gentle, mild heat rather than intense spiciness. It’s perfect for adding just enough kick without overpowering the casserole’s creamy, savory profile.
Final Thoughts
There is something undeniably comforting and utterly delicious about this Cheesy Mushroom and Onion Green Bean Casserole Recipe. It feels like a warm hug from the oven—creamy, cheesy, with a perfect crunch and layers of flavorful vegetables. If you want to make your next meal extra special with minimal fuss, this casserole is your answer. Give it a try, and I promise it’ll quickly become one of your favorite dishes to come back to again and again.
Print
Cheesy Mushroom and Onion Green Bean Casserole Recipe
- Prep Time: 10 minutes
- Cook Time: 30 minutes
- Total Time: 40 minutes
- Yield: 12 servings
- Category: Casserole
- Method: Baking
- Cuisine: American
Description
This Cheesy Mushroom and Onion Green Bean Casserole is a flavorful twist on the classic dish, combining tender green beans with sautéed sweet onions and mushrooms, creamy mushroom soup, and spicy pepper jack cheese. Topped with crispy fried onions and baked to bubbling perfection, it’s a perfect comforting side dish for family dinners or holiday meals.
Ingredients
Soup Mixture
- 2 cans (10.5 oz each) Campbell’s® Condensed Cream of Mushroom Soup
- 1 cup milk
- 1/2 tsp ground black pepper
- 1/2 tsp salt
Sautéed Vegetables
- 1 tbsp butter
- 1 tbsp olive oil
- 1 small sweet onion, thinly sliced
- 1 cup mushrooms, sliced
Main Mix-ins
- 4 cans (14.5 oz each) any style Del Monte® Green Beans, drained
Cheese & Topping
- 1 1/4 cups shredded pepper jack cheese, divided
- 2 2/3 cups French’s® Crispy Fried Onions
Instructions
- Prepare the Soup Mixture: In a large bowl, stir together the condensed cream of mushroom soup, milk, ground black pepper, and salt until smooth and well combined.
- Sauté the Vegetables: Heat butter and olive oil in a sauté pan over medium heat. Once hot, add the sliced sweet onion and mushrooms. Cook, stirring occasionally, until the vegetables become soft and golden brown. Remove from heat.
- Combine Ingredients: Add the drained green beans, sautéed onions and mushrooms to the bowl with the soup mixture. Stir until everything is evenly coated.
- Add Cheese: Fold in 1 cup of shredded pepper jack cheese and mix well until evenly incorporated into the casserole mixture.
- Assemble the Casserole: Transfer the mixture to a 3-quart casserole dish, spreading it out evenly and leaving the dish uncovered.
- Bake the Casserole: Bake in a preheated oven at 350°F (175°C) for 25 minutes, or until the bean mixture is hot and bubbling.
- Add Toppings and Finish Baking: Stir the bean mixture gently, then sprinkle the top with crispy fried onions and the remaining 1/4 cup of pepper jack cheese. Return the dish to the oven and bake for an additional 5 minutes, or until the onions are golden brown.
Notes
- Use fresh or frozen green beans if you prefer, adjusting the cooking time accordingly.
- For a spicier kick, use pepper jack cheese with jalapeños included or add some crushed red pepper flakes.
- You can substitute the cream of mushroom soup with a homemade white sauce to reduce processed ingredients.
- This casserole is best served hot and can be prepared a few hours ahead and refrigerated before baking.
- If you prefer a milder flavor, replace pepper jack cheese with mild cheddar or mozzarella.
