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This baked cheesy mushrooms casserole is a cozy dish that comes together easily for a satisfying weeknight dinner or a comforting side. With creamy cheeses melding into tender mushrooms and a crispy breadcrumb topping, it’s a dish that feels special but uses simple ingredients you likely already have on hand.
I made this after craving something warm and cheesy and it quickly became a favorite in our house for those chilly evenings.
Ingredients
- Button mushrooms: provide an earthy, meaty texture aim for firm and white mushrooms for best flavor
- Cheddar cheese: offers a sharp, tangy bite fresh aging means fuller taste
- Mozzarella cheese: melts smoothly adding that stretchy gooeyness
- Cream cheese: gives the casserole a thick, creamy base softened to blend easily
- Sour cream: adds a slight tang to balance richness choose full fat for best texture
- Onion: brings sweetness and depth finely chopped for even cooking
- Garlic: adds a punch of aromatic flavor minced fresh to avoid bitterness
- Bread crumbs: create a crunchy topping use fresh or panko crumbs for extra crunch
- Unsalted butter: is for greasing and adds richness use high quality or European style for best flavor
- Salt and pepper: to season adjust to taste enhancing all other flavors
Instructions
- Prepare The Cheese Mixture:
- In a large bowl combine softened cream cheese and sour cream until smooth. Add grated cheddar and mozzarella then season with salt and pepper. Mix thoroughly ensuring the cheeses are evenly incorporated forming a creamy blend.
- Sauté The Vegetables:
- Heat a skillet over medium heat and melt a tablespoon of butter. Add finely chopped onion and cook for about 5 minutes until translucent and fragrant stirring occasionally. Add minced garlic and cook for another minute being careful not to burn the garlic. Toss in the sliced mushrooms and cook until they release moisture and soften around 8 to 10 minutes stirring frequently. Season with salt and pepper to taste. Optionally add a splash of white wine at this stage to deepen flavor and cook until liquid mostly evaporates.
- Assemble The Casserole:
- Preheat your oven to 180°C (350°F). Butter a medium baking dish thoroughly. Spread the cooked mushroom mixture evenly across the base. Dollop and spread the cheese mixture evenly over the mushrooms creating a smooth top layer. Sprinkle the bread crumbs evenly to cover. Dot the surface with remaining butter or drizzle a little olive oil to encourage browning.
- Bake Until Golden:
- Place the casserole in the oven and bake for 25 to 30 minutes or until the top is golden brown and bubbling. Let rest for 5 minutes before serving to allow it to set slightly making it easier to portion.
Cheddar is my favorite ingredient because it gives this dish that nostalgic sharpness reminding me of family gatherings where cheese dishes always stole the show. This casserole feels like a warm hug on a plate for me.
Storage Tips
Store leftovers in an airtight container in the fridge for up to three days. Reheat in the oven at 160°C until warmed through to preserve texture. Avoid microwaving as it can make the topping soggy but in a pinch cover loosely with a paper towel first.
Ingredient Swaps
Try cremini or portobello mushrooms for deeper earthiness. Greek yogurt can replace sour cream for a lighter tang and fewer calories. Nutritional yeast can add extra cheesiness if you want to lighten dairy content.
Serving Ideas
Serve with a simple crisp green salad for freshness or alongside roasted potatoes for a heartier meal. This casserole also pairs nicely with a crusty baguette to soak up the creamy sauce.
Use cheeses that melt well to avoid grainy textures and always soften your cream cheese beforehand for smooth mixing.
Frequently Asked Recipe Questions
- → Can I use different mushroom types?
Absolutely! Mixing varieties like cremini, shiitake, or portobello can add a richer flavor and varied texture to the dish.
- → How do I keep the topping crispy?
Using panko breadcrumbs instead of regular crumbs helps create a crispier golden crust when baked.
- → Is there a way to add more depth to the mushrooms?
Sautéing the mushrooms with a splash of white wine before baking enhances their earthiness and layers more flavor.
- → Can I prepare this dish ahead of time?
Yes, you can assemble it in advance and refrigerate. Bake it just before serving to maintain the crispy topping.
- → What cheese combinations work best?
A mix of sharp cheddar, mild mozzarella, and creamy cheeses like cream cheese or sour cream creates a luscious, balanced sauce.