Richly cheesy, tender mushroom filling comes together in this Baked Cheesy Mushroom Casserole recipe that is decadent and over the top and totally baked. The buttery breadcrumbs on top give it an exquisitely creamy, crispy texture; it’s a terrific accompaniment to any main dish but also a perfect cozy comfort food alone. Simply top with a few sprigs of fresh parsley to serve for a burst of color and flavor!
Why You’ll Love This Recipe:
Creamy and Cheesy: The cheddar, Parmesan, and heavy cream combine to form a cheesy, rich casserole that’s as satisfying as can be.
Quick Prep: This recipe comes together quickly with a few ingredients.
Versatile Side Dish: This goes perfectly with many kinds of main courses, making it a fantastic selection for family dinners or special occasions.
Perfect Texture: A crunchy breadcrumb topping perfectly balances the creamy sauce and soft shells, creating a textural ecstasy in every mouthful.
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Key Ingredients:
Button Mushrooms: Button mushrooms are mild and tender, but you can use cremini or baby bella mushrooms in their place for a deeper flavor.
Garlic Powder and Thyme: The earthy quality of these seasonings enhances the other flavors of the mushrooms, making a savory flavor that works alongside the creaminess.
As for Cheese: Cheddar: Cheddar melts nicely to gooey perfection + Parmesan: Parmesan is a great nutty topping, melted or grated.
Heavy Cream: Heavy cream, the sauce base, giving a rich, velvety texture to hold all ingredients together. For something a bit lighter, feel free to use half-and-half.
Breadcrumbs: Mixing breadcrumbs with melted butter lends a crusty finish; you can leave it out for a gluten-free dish or to lower the carbs.
Fresh Parsley: Provides a refreshing, herbaceous flavor and vibrant hue to the finished meal.
Full list of ingredients with amounts and instructions can be found in the recipe card below
Step-by-Step Instructions
Preheat the Oven:
Preheat oven to 375°F (190°C). Film a 9×13-inch baking dish with a little oil to keep it from sticking.
Season the Mushrooms:
Add the mushroom slices to a mixing bowl with olive oil, garlic, thyme, salt, and pepper. Toss until the mushrooms are well coated with the seasoning.
Layer the Dish:
Evenly distribute the mushroom mixture over the bottom of the prepared baking dish.
Add the Cheese:
Evenly distribute the shredded cheddar and grated Parmesan cheese on top of the mushrooms.
Pour the Cream:
Pour the heavy cream evenly over the mushrooms and cheese, which will become a creamy sauce as it cooks.
Make the Breadcrumb Topping:
In another bowl, stir together the melted butter and breadcrumbs until they’re fully combined. Chews needs a helping hand to get there (and to be honest, I think the crisp topping/chews are a match made in heaven), throughout the casserole.
Bake the Casserole:
Put the baking dish into the preheated oven and cook for 25-30 minutes, until the top has turned golden brown and the sauce is bubbling at the edges.
Optional Broil:
For an extra crispy crust, broil the casserole for an additional 2-3 minutes after it comes out of the oven. Watch carefully so that they don’t burn.
Rest and Garnish:
Allow the casserole to rest for several minutes to set. Chop some parsley to garnish it.
Serving Suggestions:
This cheesy mushroom casserole goes great with so many main dishes. Here are a few ideas:
Grilled Chicken or Steak: The casserole’s rich creaminess works well with the smokiness of grilled meats.
Roast Beef or Pork: Serve with a hearty roast for a classic comfort-food meal.
Pasta: You can serve it alongside a simple pasta or risotto for a filling vegetarian meal.
Roasted Vegetables: Serve alongside roasted asparagus or Brussels sprouts to cut the richness.
Storage and Reheating Tips:
This casserole can be made ahead or have leftovers, and it stores well.
Refrigeration: Leftovers can be kept in an airtight container in the fridge for up to 3 days.
Freezing: If you want to freeze it, let the casserole cool completely, tightly wrap with plastic wrap and foil, and freeze for up to 1 month. (Defrost overnight in the refrigerator before reheating.)
Reheating: Reheat in the oven at 350°F (175°C) for 10-15 min, or until heated through. If the casserole has gotten too thick, add a splash of cream.
Recipe Variations:
Pinch of Spinach: Add a handful of fresh spinach to the mushroom layer to keep the nutrients and flavor levels up.
Low-Carb: Leave out the breadcrumbs for a low-carb version, or substitute crushed pork rinds for a keto-friendly topping.
Different cheese: Substitute cheddar with mozzarella or Gruyère for a different flavor.
Herbed Version: Mix in fresh herbs such as basil, rosemary, or thyme for flavorful twist.
Spicy Kick: Add a touch of heat by stirring a pinch of red pepper flakes into the breadcrumb topping.
Conclusion:
This Baked Cheesy Mushroom Casserole is a feel-good, easy-to-assemble comfort dish that marries earthy mushrooms, rich cheeses and a creamy sauce with just a bit of crunch on top. It’s great for weeknight dinners, holiday meals or just any time you want something rich and satisfying.
Check out this recipe and enjoy each and every cheesy, creamy bite!
Baked Cheesy Mushrooms Casserole
Ingredients
- 1 lb button mushrooms sliced
- 1 tbsp olive oil for seasoning
- 1 tsp garlic powder for seasoning
- 1 tsp dried thyme for seasoning
- 1/2 tsp salt to taste
- 1/4 tsp black pepper to taste
- 1 cup shredded cheddar cheese for topping
- 1/2 cup grated Parmesan cheese for topping
- 1 cup heavy cream for creamy sauce
- 2 tbsp unsalted butter melted, for breadcrumb topping
- 1/2 cup breadcrumbs optional, for crispy topping
- 1 fresh parsley chopped, for garnish
Instructions
- Preheat your oven to 375°F (190°C) and lightly grease a 9×13-inch baking dish to prevent sticking.
- In a mixing bowl, combine sliced mushrooms with olive oil, garlic powder, thyme, salt, and pepper. Toss to coat the mushrooms evenly.
- Spread the seasoned mushroom mixture evenly across the bottom of the prepared baking dish.
- Sprinkle shredded cheddar and grated Parmesan cheese evenly over the mushrooms, creating a cheesy layer.
- Pour the heavy cream evenly over the mushrooms and cheese, which will form a creamy sauce as it bakes.
- In a separate bowl, combine melted butter with breadcrumbs, stirring until well mixed. Sprinkle this breadcrumb mixture over the top of the casserole.
- Place the baking dish in the preheated oven and bake for 25-30 minutes, or until the top is golden brown and the sauce is bubbling around the edges.
- For an extra crispy topping, broil the casserole for an additional 2-3 minutes after baking. Watch closely to avoid burning.
- Let the casserole rest for a few minutes. Garnish with freshly chopped parsley before serving.