Stuffed Mushroom Casserole

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If you’re a fan of stuffed mushrooms but don’t love the fuss of stuffing each cap individually, this Stuffed Mushroom Casserole is the cozy, cheesy shortcut you didn’t know you needed. Imagine all the garlicky, herby, creamy goodness of your favorite stuffed mushrooms, baked together with a golden, crispy topping. It’s comforting, savory, and incredibly satisfying — the perfect centerpiece or hearty side for any dinner.

This dish transforms the beloved appetizer into a family-style casserole that’s easy to prepare and even easier to love. With tender mushrooms nestled in a creamy cheese sauce and topped with buttery breadcrumbs, it’s a hit whether served on a holiday table or as a weeknight dinner.

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Why You’ll Love This Stuffed Mushroom Casserole

This casserole is everything you adore about traditional stuffed mushrooms — but without all the work! It brings together rich umami flavors from the mushrooms, a luscious, creamy cheese base, and a topping that adds the perfect crunch. Whether you’re hosting guests or just craving comfort food, this dish delivers flavor and convenience in one delicious bake.

Plus, it can be prepped ahead and baked right before serving, making it ideal for gatherings or meal prepping.

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What Kind of Mushrooms Should I Use?

Baby bella (cremini) mushrooms are ideal for this recipe because they bring a deep, earthy flavor and hold up well when baked. However, you can also use white button mushrooms or even a mix of both for a bit of variety in texture and taste.

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Ingredients for the Stuffed Mushroom Casserole

Each ingredient in this casserole brings its own flair to the final dish. Here’s what you’ll need:

Mushrooms – Baby bellas are best here. Their meaty texture and umami depth are key.

Cream cheese – It creates a creamy, tangy base that binds the stuffing mixture together.

Garlic – Freshly minced garlic infuses the casserole with bold, aromatic flavor.

Parmesan cheese – Adds saltiness, richness, and a sharp bite that balances the creamy elements.

Mozzarella cheese – Melts beautifully and gives the casserole that irresistible cheesy pull.

Italian breadcrumbs – The golden crunch on top that makes each bite so satisfying.

Butter – Helps the breadcrumbs crisp up to a beautiful golden brown.

Fresh parsley – For a pop of freshness and color on top.

Salt and pepper – Enhances all the flavors in the dish.

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How To Make the Stuffed Mushroom Casserole

Step 1: Prep the Mushrooms

Wipe the mushrooms clean and remove the stems. Chop the stems finely and set them aside to be added to the filling.

Step 2: Sauté the Aromatics

In a skillet, sauté garlic and the chopped mushroom stems in a bit of butter or olive oil until soft and fragrant.

Step 3: Make the Filling

In a large bowl, mix the sautéed stems and garlic with cream cheese, half the mozzarella, and half the Parmesan. Season with salt and pepper.

Step 4: Assemble the Casserole

Layer the mushroom caps in a greased baking dish. Spoon the filling mixture over and around them. Sprinkle the rest of the mozzarella and Parmesan on top.

Step 5: Add the Topping

In a small bowl, combine the breadcrumbs with melted butter. Sprinkle evenly over the casserole.

Step 6: Bake to Perfection

Bake at 375°F (190°C) for 25-30 minutes or until the top is golden and bubbly. Garnish with fresh parsley before serving.

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How to Serve and Store Stuffed Mushroom Casserole

This casserole serves 6-8 people, making it perfect for a dinner party or potluck. Serve it straight from the oven while it’s still warm and gooey. Pair it with a crisp salad or a simple roasted protein for a complete meal.

To store leftovers, let the dish cool completely, then cover tightly and refrigerate for up to 3 days. Reheat in the oven at 350°F (175°C) until warmed through.

You can also freeze it before baking. Assemble the casserole, cover it well, and freeze for up to a month. When ready, bake straight from frozen, adding about 15 extra minutes to the cook time.

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What to Serve With Stuffed Mushroom Casserole?

Garlic Butter Green Beans

Bright and crisp green beans lightly sautéed with garlic and butter balance the richness of the casserole.

Roasted Chicken

A simple roasted chicken is a great protein partner that doesn’t overpower the mushroom flavors.

Crusty Bread

Soak up all that cheesy sauce with slices of warm, crusty bread or garlic toast.

Mixed Greens Salad

A light salad with a tangy vinaigrette brings a refreshing contrast to this creamy, hearty dish.

Buttery Mashed Potatoes

Double down on the comfort food with creamy mashed potatoes to complement the casserole.

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Frequently Asked Questions

Can I use canned mushrooms instead of fresh?
Fresh mushrooms are strongly recommended for this casserole because they hold their shape and offer better flavor. Canned mushrooms may become too soft and watery.

Can I make this casserole ahead of time?
Yes! Assemble the casserole up to a day in advance, cover, and refrigerate. Bake just before serving. You can also freeze it for up to a month.

Can I make it vegetarian or gluten-free?
Absolutely. This dish is naturally vegetarian. To make it gluten-free, use gluten-free breadcrumbs in the topping.

What other cheese can I use?
Feel free to experiment! Fontina, Gruyère, or white cheddar work wonderfully in place of mozzarella or Parmesan.

Can I double the recipe for a larger crowd?
Yes, this casserole scales well. Use a larger baking dish and increase the cooking time slightly to ensure it heats through.

Looking for more comforting meal ideas? Check out our [Cheesy Broccoli Rice Casserole] or explore other [easy dinner ideas].

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