Creamy Mushroom Pasta Bake Recipe
Introduction
This creamy mushroom pasta bake is a comforting, cheesy dish perfect for weeknight dinners or casual gatherings. Roasted Baby Bella mushrooms combine with tender rigatoni and a rich blend of cheeses for a hearty, satisfying meal.

Ingredients
- 1 1/2 pounds Baby Bella mushrooms, quartered
- 1 teaspoon kosher salt
- 1 teaspoon black pepper
- 3 tablespoons fresh thyme
- 1/4 cup olive oil
- 1 pound rigatoni
- 3/4 pound ricotta cheese
- 1/2 pound fontina cheese, shredded
- 3/4 cup heavy cream
- 8 ounces baby spinach, steamed and drained
- 2 cloves garlic, in paste form
- 1/2 cup Parmigiano Reggiano, divided
- 1 pinch nutmeg (optional)
Instructions
- Step 1: Preheat the oven to 450°F. Position one rack in the second-lowest position and another in the middle. Toss the quartered mushrooms with olive oil, fresh thyme, kosher salt, and black pepper. Spread them evenly on a baking sheet, ensuring they are not crowded. Roast on the lower rack for 15–20 minutes until well browned. Use two baking sheets if needed to avoid overcrowding.
- Step 2: While the mushrooms roast, bring a large pot of salted water (with 2 tablespoons kosher salt) to a boil. Cook the rigatoni until very al dente—about 2 minutes less than the package instructions recommend. Drain and set aside.
- Step 3: Steam the baby spinach for 30 seconds in boiling water, then drain thoroughly. Squeeze out excess water and chop the spinach. In a large bowl, combine the chopped spinach, nutmeg (if using), heavy cream, ricotta, shredded fontina, 1/4 cup of the Parmigiano Reggiano, garlic paste, and the roasted mushrooms. Mix well.
- Step 4: Add the cooked rigatoni to the bowl and toss to combine all ingredients thoroughly. Taste the mixture and adjust salt and pepper as needed. Transfer everything to a 9×13-inch baking dish. Sprinkle the remaining Parmigiano Reggiano evenly on top. Cover the dish with parchment paper and then foil to prevent sticking, and bake on the middle rack for 15 minutes.
- Step 5: Remove the parchment and foil coverage, then continue baking uncovered for an additional 5 minutes until the top turns golden brown. For extra color, you can broil for 1–2 minutes at the end—watch closely to avoid burning.
- Step 6: Allow the pasta bake to rest for 15 minutes before serving. This resting time helps the cheese to settle and the flavors to blend. Enjoy your creamy mushroom pasta bake warm!
Tips & Variations
- To boost flavor, substitute fresh thyme with a mix of rosemary and sage.
- Use gluten-free pasta if you need a gluten-free version of this dish.
- For a lighter option, swap heavy cream with half-and-half or whole milk, but the sauce will be less rich.
- If fontina isn’t available, mozzarella or gruyere are great alternatives for melting quality.
- Add cooked pancetta or bacon for a smoky twist.
Storage
Store leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, warm in the oven at 350°F until hot, about 15–20 minutes, or microwave individual portions until heated through. Avoid reheating multiple times to maintain creaminess and texture.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I make this recipe ahead of time?
Yes, you can assemble the pasta bake up to a day in advance. Keep it covered and refrigerated, then bake it just before serving. You may need to add a few extra minutes to the baking time if baking straight from the fridge.
What if I don’t have Baby Bella mushrooms?
Cremini mushrooms are the same as Baby Bella and work perfectly. You can also use white button mushrooms, but roasting times may vary slightly.
Print
Creamy Mushroom Pasta Bake Recipe
- Total Time: 55 minutes
- Yield: 6 servings 1x
- Diet: Vegetarian
Description
This Creamy Mushroom Pasta Bake combines tender rigatoni with roasted Baby Bella mushrooms, creamy ricotta, fontina, and Parmigiano Reggiano cheeses, along with sautéed spinach and fragrant garlic. Baked to golden perfection, this comforting casserole is rich, flavorful, and perfect for a cozy family dinner.
Ingredients
Mushroom and Herb Mixture
- 1 1/2 pounds Baby Bella mushrooms, quartered
- 1 teaspoon kosher salt
- 1 teaspoon black pepper
- 3 tablespoons fresh thyme
- 1/4 cup olive oil
Pasta and Cheese Mixture
- 1 pound rigatoni
- 3/4 pound ricotta cheese
- 1/2 pound fontina cheese, shredded
- 3/4 cup heavy cream
- 8 ounces baby spinach, steamed and drained
- 2 cloves garlic, garlic paste
- 1/2 cup Parmigiano Reggiano, divided
- 1 pinch nutmeg (optional)
Instructions
- Roast Mushrooms: Preheat your oven to 450°F and arrange one rack in the second-lowest position and another in the middle. Toss the quartered mushrooms with olive oil, fresh thyme, kosher salt, and black pepper until evenly coated. Spread the mushrooms in a single layer on a baking sheet, avoiding overcrowding. Roast on the lower rack for 15 to 20 minutes until the mushrooms are well browned and caramelized. Use two baking sheets if needed for even roasting.
- Cook Pasta: While the mushrooms roast, bring a large pot of water to a boil, adding 2 tablespoons kosher salt for seasoning. Cook the rigatoni until very al dente, about 2 minutes less than the package directions recommend. Drain the pasta when ready, and set aside.
- Prepare Spinach and Mix Cheeses: Briefly cook the baby spinach by boiling it for 30 seconds, then drain thoroughly. Once cool enough to handle, squeeze out all remaining moisture and chop finely. In a large mixing bowl, combine the chopped spinach, nutmeg if using, heavy cream, ricotta, shredded fontina, 1/4 cup of the Parmigiano Reggiano, garlic paste, and the roasted mushrooms. Mix well to form a creamy mixture.
- Combine Pasta and Cheese Mixture: Add the cooked rigatoni to the bowl with the mushroom-cheese mixture and gently mix until all pasta pieces are evenly coated. Taste the mixture and adjust salt and pepper to your preference. Transfer the combined mixture into a 9×13-inch baking dish, spreading evenly.
- Bake Covered: Sprinkle the remaining 1/4 cup of Parmigiano Reggiano over the top. Cover the baking dish with parchment paper and then aluminum foil to prevent sticking and retain moisture. Bake in the preheated oven on the middle rack for 15 minutes until bubbly and heated through.
- Finish Baking and Broil: Remove the parchment and foil covering, then continue baking uncovered for an additional 5 minutes to develop a golden crust. For an even more appealing golden top, broil the pasta bake for 1 to 2 minutes at the end, watching carefully to avoid burning.
- Rest and Serve: Allow the pasta bake to rest for 15 minutes after removing it from the oven. This resting time helps the cheeses settle and the flavors to meld. Serve warm and enjoy your creamy mushroom pasta bake!
Notes
- Do not overcrowd mushrooms when roasting to ensure they brown evenly.
- Cooking rigatoni al dente prevents the pasta from becoming mushy after baking.
- Covering the dish during the initial baking keeps the pasta moist and prevents the top from drying out.
- Use fresh thyme for the best herb flavor; dried can be substituted but reduce quantity to 1 tablespoon.
- Broiling at the end adds a lovely golden finish but requires close monitoring to avoid burning.
- Resting the dish before serving allows the cheese to set for easier slicing.
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Category: Main Dish
- Method: Baking
- Cuisine: Italian
Keywords: Creamy Mushroom Pasta Bake, baked rigatoni, vegetarian pasta casserole, mushroom pasta recipe, baked pasta with spinach and cheese

