Creamy Oven-Baked Sausage and Mushroom Pasta Gratin

This oven-baked sausage and mushroom pasta gratin is the ultimate comfort food. It combines perfectly cooked pasta, savory sausage, tender mushrooms, and a rich, creamy sauce, all topped with melted cheese and baked until golden and bubbly.

It’s a satisfying dish that’s perfect for family dinners, meal prep, or whenever you’re craving something warm, cheesy, and full of flavor.

Time Required

Preparation time: 15 minutes
Cooking time: 30 minutes
Total time: 45 minutes

Ingredients

Pasta:

300g pasta (penne, rigatoni, or fusilli)
Water (for boiling)
1 teaspoon salt

Filling:

2 tablespoons olive oil
2–3 Italian sausages (sliced or crumbled)
1 small onion (finely chopped)
2 garlic cloves (minced)
200g mushrooms (sliced)

Creamy Sauce:

1 cup heavy cream
½ cup chicken broth
½ cup grated Parmesan cheese
1 teaspoon dried oregano
½ teaspoon dried thyme
Salt and black pepper (to taste)

Topping:

1 cup shredded mozzarella cheese
Extra Parmesan cheese (optional)
Fresh parsley (optional, for garnish)

Kitchen Tools

Large pot
Frying pan or skillet
Wooden spoon or spatula
Baking dish
Oven

Step-by-Step Instructions

Step 1: Cook the Pasta

Start by preheating your oven to 375°F (190°C).

Bring a large pot of salted water to a boil. Add the pasta and cook it according to the package instructions until it is al dente (slightly firm when bitten).

Drain the pasta and set it aside. Avoid overcooking, as it will continue cooking later in the oven.

Step 2: Cook the Sausage

Heat olive oil in a large skillet over medium heat.

Add the sausage (either sliced or crumbled) and cook until browned and fully cooked through. This should take about 5–7 minutes.

Once done, remove the sausage from the pan and set it aside.

Step 3: Cook the Vegetables

In the same skillet (without cleaning it, to keep the flavor):

Add the chopped onion and cook until soft and translucent
Add the minced garlic and cook for about 30 seconds
Add the sliced mushrooms and cook until they release their moisture and become tender

This step builds a deep, rich flavor base for the dish.

Step 4: Prepare the Creamy Sauce

Pour the heavy cream and chicken broth into the skillet with the vegetables.

Stir everything together and let it simmer gently for a few minutes until it begins to thicken slightly.

Add:

Parmesan cheese
Oregano
Thyme
Salt and black pepper

Mix well until the cheese melts completely and the sauce becomes smooth and creamy.

Step 5: Combine Ingredients

Return the cooked sausage to the skillet.

Add the cooked pasta and gently mix everything together until all the pasta is evenly coated with the creamy sauce.

Step 6: Assemble the Gratin

Transfer the pasta mixture into a lightly greased baking dish.

Spread it evenly, then top with:

Shredded mozzarella cheese
Extra Parmesan cheese (optional, for a crispy golden crust)

Step 7: Bake

Place the dish in the oven and bake for 20–25 minutes, or until:

The cheese is fully melted
The top is golden and slightly crispy
The sauce is bubbling around the edges

For an extra crispy top, switch to broil for the last 2–3 minutes.

Step 8: Serve

Remove the dish from the oven and let it rest for about 5 minutes before serving.

Garnish with freshly chopped parsley if desired. Serve warm and enjoy!

Tips for Best Results

Don’t overcook pasta: Keep it slightly firm before baking
Use fresh Parmesan: It melts better and tastes richer
Add spice: A pinch of chili flakes gives a nice kick
Make it lighter: Substitute heavy cream with half-and-half
Extra flavor: Add a bit of butter at the end for richness

Variations

Add spinach or zucchini for a healthier twist
Use chicken instead of sausage
Try different cheeses like cheddar or gouda
Make it vegetarian by skipping the sausage

Why This Recipe Works

Perfect balance of creamy and savory flavors
Easy to prepare with simple ingredients
Great for leftovers (it tastes even better the next day!)
Crowd-pleasing dish for any occasion