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If you’ve ever craved a cozy, comforting side dish that dazzles with creamy texture and bold flavor, you absolutely have to try this Cheesy Mushroom and Onion Green Bean Casserole Recipe. It’s a perfect balance of tender green beans enveloped in a luscious mushroom-infused sauce, with sautéed sweet onions and mushrooms adding a savory depth. Plus, that pepper jack cheese lends just the right touch of zing, while the crispy fried onions on top deliver a golden, irresistible crunch. This casserole is the kind of dish that brings warmth to the table and smiles all around.
Ingredients You’ll Need
Getting the perfect balance of flavors and textures in this casserole is surprisingly simple, thanks to straightforward ingredients that pack a punch. Each one plays an essential role, from the creamy soup base to the crispy topping, creating a dish that’s savory, cheesy, and satisfying.
- 2 cans (10.5 oz. each) Campbell’s® Condensed Cream of Mushroom Soup: This rich, creamy soup forms the luscious sauce that coats every green bean.
- 1 cup milk: Helps thin out the soup mixture for a smooth, velvety texture.
- 1/2 tsp ground black pepper: Adds subtle warmth and depth to the casserole’s flavor.
- 1/2 tsp salt: Enhances all the savory notes without overpowering the dish.
- 1 tbsp butter: Used for sautéing and infusing the vegetables with a rich flavor.
- 1 tbsp olive oil: Balances the butter’s richness and helps vegetables brown beautifully.
- 1 small sweet onion, thinly sliced: Offers a gentle sweetness and softness that complements the mushrooms.
- 1 cup mushrooms, sliced: Delivers earthiness and umami that make this casserole so comforting.
- 4 cans (14.5 oz. each) any style Del Monte® Green Beans, drained: The star of the show—tender green beans in just the right quantity.
- 1 1/4 cups shredded pepper jack cheese, divided: Provides a creamy, slightly spicy kick that melts perfectly throughout.
- 2 2/3 cups French’s® Crispy Fried Onions: The crowning glory—crunchy, golden topping that adds amazing texture and flavor contrast.
How to Make Cheesy Mushroom and Onion Green Bean Casserole Recipe
Step 1: Prepare the Soup Mixture
Start by whisking together the condensed cream of mushroom soup, milk, ground black pepper, and salt in a large bowl. This silky base is going to envelop your green beans in creamy richness and unite all the flavors in the dish. Make sure to stir until it’s perfectly smooth with no lumps—that’s the secret to a velvety casserole.
Step 2: Sauté the Vegetables
Heat butter and olive oil over medium heat in a sauté pan. Once the fat is hot, toss in your thinly sliced sweet onions and mushrooms. Stir occasionally as they cook, letting the onions soften and the mushrooms release their lovely earthy juices. Aim for a golden brown color that brings out their natural sweetness and umami flavors. This step adds a wonderful depth of flavor that makes this casserole feel homemade and special.
Step 3: Combine Ingredients
Now, add the drained green beans along with your beautifully sautéed onions and mushrooms into the soup mixture bowl. Stir gently but thoroughly, ensuring every green bean gets coated with that creamy, flavorful sauce. The blend of textures and tastes at this stage promises a delightful eating experience.
Step 4: Add Cheese
Fold in 1 cup of shredded pepper jack cheese into your mixture, mixing until the cheese is evenly incorporated. This melting cheese gives the casserole its signature creamy, slightly spicy zing, elevating the whole dish from simple to extraordinary.
Step 5: Assemble the Casserole
Transfer your luscious mixture into a 3-quart casserole dish. Spread it evenly so that every bite has the perfect balance of beans, sauce, and cheese. Leaving the dish uncovered will allow the top to bake nicely later.
Step 6: Bake the Casserole
Place the casserole in a preheated oven set to 350°F (175°C). Bake for 25 minutes until the bean mixture is hot and bubbling—this heats the ingredients through and melds all the flavors beautifully into one creamy casserole.
Step 7: Add Toppings and Finish Baking
After baking, gently stir the bean mixture, then sprinkle the surface with crispy fried onions and the remaining 1/4 cup of pepper jack cheese. Return the dish to the oven for 5 more minutes, or until those onions turn a gorgeous golden brown, adding an irresistible crunch that contrasts with the creamy interior.
How to Serve Cheesy Mushroom and Onion Green Bean Casserole Recipe
Garnishes
A simple sprinkle of chopped fresh parsley or chives adds a pop of color and a fresh note that brightens the casserole’s rich flavors. A dash of freshly cracked black pepper on top just before serving can also enhance the taste beautifully.
Side Dishes
This casserole shines alongside roasted turkey or chicken and pairs wonderfully with mashed potatoes or fluffy dinner rolls to soak up every last bit of the cheesy sauce. For a complete meal, consider adding a crisp green salad to contrast the warm, creamy texture of the casserole.
Creative Ways to Present
For a stunning holiday table, serve this casserole in individual ramekins topped with extra crispy fried onions and a tiny sprig of fresh thyme. Alternatively, layer the casserole with thin slices of cooked bacon or walnuts before baking to add a savory crunch and extra dimension.
Make Ahead and Storage
Storing Leftovers
Store any leftovers in an airtight container in the refrigerator for 3 to 4 days. This is a fridge-friendly casserole that keeps its flavor and texture well, making it perfect for next-day lunches or sides.
Freezing
This Cheesy Mushroom and Onion Green Bean Casserole Recipe freezes beautifully. Assemble the casserole but don’t add the fried onions topping. Freeze in a tightly sealed container for up to 2 months. When ready, thaw overnight in the fridge and add the toppings before baking.
Reheating
To reheat, warm individual portions in the microwave until heated through, or place the casserole back in a 350°F oven for 15-20 minutes, uncovered, to bring back that bubbling goodness and crisp up the topping if added fresh.
FAQs
Can I use fresh green beans instead of canned?
Absolutely! If using fresh green beans, blanch them in boiling water for a few minutes until tender-crisp, then drain and proceed with the recipe. This can add a fresher texture and flavor, though canned green beans bring convenience without sacrificing taste.
Is there a vegetarian version of this casserole?
Yes! The recipe is naturally vegetarian if you use vegetable broth or milk products free from animal rennet. Just double-check the crispy fried onions to ensure they don’t contain any hidden animal ingredients.
Can I substitute the pepper jack cheese?
Definitely. Pepper jack adds a nice spicy kick, but you can use cheddar, Monterey Jack, or even mozzarella if you prefer a milder cheese. Adjust the amount according to your taste for cheesiness.
How can I make this casserole gluten-free?
Use gluten-free cream of mushroom soup and crispy fried onions labeled gluten-free. Alternatively, make your own crispy topping with gluten-free breadcrumbs or toasted nuts for a tasty crunch.
Can I prepare this casserole entirely ahead of time and bake later?
Yes! Mix everything except the crispy fried onions, cover tightly, and refrigerate for up to 24 hours. Add the topping fresh just before baking to maintain that signature crispy texture.
Final Thoughts
This Cheesy Mushroom and Onion Green Bean Casserole Recipe is truly a crowd-pleaser that combines simple ingredients for a dish bursting with rich flavors and textures. Next time you want to impress guests or simply indulge in comfort food, give this recipe a try. It’s sure to become a cherished favorite in your kitchen.
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Cheesy Mushroom and Onion Green Bean Casserole Recipe
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
- Yield: 12 servings
- Category: Side Dish
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Description
This Cheesy Mushroom and Onion Green Bean Casserole is a comforting and flavorful side dish perfect for family dinners and holiday gatherings. Featuring tender green beans blended with creamy mushroom soup, sautéed onions and mushrooms, and gooey pepper jack cheese, this baked casserole is topped with crispy fried onions for a satisfying crunch.
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 green beans instead of canned for a fresher flavor; just steam and drain before mixing.
- Substitute pepper jack cheese with cheddar cheese if preferred for a milder taste.
- For extra richness, add a splash of heavy cream to the soup mixture.
- Make this casserole ahead and refrigerate before baking; add extra baking time if baking from cold.
- To make it gluten-free, use gluten-free fried onions or omit them from the topping.
