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Creamy Spinach & Mushroom Bake (Rich, Comforting & Easy!)

Updated: 2 days ago


Baked casserole with melted cheese, mushrooms, and spinach, being served with a wooden spoon. Golden-brown crust, herbs sprinkled.

This Creamy Spinach & Mushroom Bake is a cozy, comforting side dish made with tender mushrooms, wilted spinach, garlic, and a velvety cream sauce topped with melty cheese. Perfect alongside mains like Prime Rib Roast, Southern Fried Chicken, or Honey Garlic Chicken, and a delicious addition to holiday tables, weeknight dinners, or potluck spreads.

Why You’ll Love This

  • Creamy baked dish with tender spinach and savory mushrooms

  • Rich, comforting flavor that pairs well with many meals

  • Simple ingredients baked into a satisfying side or main

  • Perfect for weeknight dinners, holidays, or vegetarian comfort meals

Recipe Card

Prep Time: 10 minutes Cook Time: 25–30 minutes Total Time: 35–40 minutes Servings: 6

Ingredients

For the Bake

  • 2 tbsp butter

  • 1 tbsp olive oil

  • 1 small onion, diced

  • 2 cloves garlic, minced

  • 16 oz sliced mushrooms (baby bella or white)

  • 1 tsp Italian seasoning

  • ½ tsp onion powder

  • Salt & black pepper, to taste

  • 10 oz fresh spinach (or 1 box frozen, thawed and squeezed dry)

  • 1 cup heavy cream

  • ½ cup chicken broth (or vegetable broth)

  • 4 oz cream cheese, softened

  • 1 cup shredded mozzarella

  • ½ cup shredded parmesan

Optional Topping

  • ½ cup buttery breadcrumbs or crushed Ritz crackers

  • 2 tbsp melted butter

Instructions

  1. Preheat the Oven: Preheat to 375°F (190°C). Grease an 8×8 or 9×9 baking dish.

  2. Sauté the Vegetables: Heat butter and olive oil in a large skillet. Add onions and cook 3–4 minutes. Add garlic and mushrooms; cook until mushrooms release moisture and begin to brown (about 8 minutes).

  3. Add Seasoning & Spinach: Stir in Italian seasoning, onion powder, salt, and pepper. Add spinach and cook until wilted (or warmed through if using frozen).

  4. Make It Creamy: Add heavy cream, broth, and cream cheese. Stir until smooth and creamy. Mix in ½ cup mozzarella and ¼ cup parmesan.

  5. Transfer the Dish: Pour the mixture into the prepared baking dish.

  6. Top & Bake: Sprinkle with remaining mozzarella and parmesan. (Optional) Mix breadcrumbs with melted butter and sprinkle over the top. Bake 20–25 minutes, until bubbly and lightly golden.

  7. Cool & Serve: Let it sit 5 minutes before serving so the sauce thickens.

Ways to Serve

FAQ

Can I use frozen spinach?

Yes — just thaw it fully and squeeze out ALL excess moisture.

Can I make this lighter?

Swap heavy cream for half-and-half and reduce the cheese slightly.

Can I make it ahead?

Yes. Assemble up to 24 hours ahead, refrigerate, then bake right before serving.

Can I add protein?

Absolutely — shredded chicken, ground turkey, or bacon are great additions.

Can I freeze it?

Yes, but freeze before baking for the best texture.

What mushrooms work best?

Baby bella or cremini have the best flavor, but white mushrooms also work well.

Conclusion

This Creamy Spinach & Mushroom Bake is rich, flavorful, and incredibly versatile — perfect as a comforting side dish or even a vegetarian main when served with pasta, rice, or crusty bread. The combination of mushrooms, spinach, garlic, and cheese makes it a cozy classic your readers will save, share, and remake again and again.

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