Baked Jumbo Shells

Creamy spinach and ricotta stuffed into jumbo pasta shells, baked in rich marinara, and blanketed in bubbly melted mozzarella.

Why This Recipe Works:

• Squeezing the spinach dry prevents water from diluting the rich cheese filling.
• Adding an egg yolk binds the ricotta's protein matrix, keeping it creamy yet structurally intact.
• Baking covered first traps steam to finish cooking the pasta, then uncovered to brown the cheese.

My sister and I once spent an entire rainy Tuesday afternoon trying to stuff jumbo pasta shells with a plastic sandwich bag we had makeshifted into a piping bag. It burst within three seconds, sending cold, flecked ricotta flying straight onto the kitchen cabinets. We ended up using our bare fingers, laughing until our ribs ached while packing the cheese into the slippery pasta.

Honestly, your hands are hands-down the best tool for this job anyway.

Most home cooks end up with a watery, bland puddle in their baking dish because they don't drain their spinach properly. The excess moisture leaks out during baking, completely diluting the delicate dairy fat of the ricotta.

To prevent this, you must wring out the thawed spinach in a clean kitchen towel until your forearms ache and not a single drop of green water remains. We also use a single egg yolk to bind the protein matrix of the cheese, ensuring the filling holds its shape instead of weeping into the sauce. I tested this with several brands of ricotta, and Galbani whole milk ricotta won hands down for its low moisture content and creamy mouthfeel, which pairs beautifully with tomatoes just like in our Garlic Butter Shrimp dish. If you want a low-carb alternative to pasta, you can try making zucchini rollatini which uses a very similar rich ricotta filling, or check out our other favorite stuffed pasta shells variation.

Trust me on this one; taking that extra five minutes to squeeze the spinach makes all the difference. Let's get our baking dishes ready.

Baked Jumbo Shells

• Publisher Storied Skillet
• Cuisine Italian
• Category Dinner, Pasta
• Prep Time 25 mins
• Cook Time 35 mins
• Servings 6
• Calories 420 calories
• Rating 4.8 4589
• Tags baked jumbo shells, stuffed shells, spinach ricotta pasta, easy dinner

Ingredients

• 12 oz jumbo pasta shells (about 30-34 shells)
• 15 oz whole milk ricotta cheese
• 10 oz frozen chopped spinach, thawed and squeezed completely dry
• 1/2 cup freshly grated Parmesan cheese, divided
• 1 large egg yolk
• 2 cloves garlic, minced
• 1 tsp Diamond Crystal kosher salt
• 1/2 tsp freshly cracked black pepper
• 1/4 tsp freshly grated nutmeg
• 3 cups high-quality marinara sauce
• 2 cups shredded low-moisture mozzarella cheese

Directions

1. Preheat your oven to 375°F (190°C). Boil the jumbo shells in a large pot of salted water for 2 minutes less than the package directions for al dente. They will finish cooking in the oven.
2. Drain the pasta and spread the shells out on a baking sheet lined with parchment paper to prevent them from sticking together or tearing.
3. In a large bowl, combine the squeezed spinach, ricotta, half of the Parmesan, egg yolk, minced garlic, kosher salt, black pepper, and nutmeg. Stir vigorously until completely smooth.
4. Spread 1.5 cups of marinara sauce evenly across the bottom of a 9x13-inch baking dish.
5. Using a spoon or your clean hands, stuff each pasta shell with about 2 tablespoons of the spinach-ricotta mixture. Arrange the stuffed shells snugly in the baking dish in a single layer.
6. Spoon the remaining marinara sauce over the tops of the shells, then sprinkle evenly with the shredded mozzarella and the remaining Parmesan cheese.
7. Cover the dish tightly with aluminum foil and bake for 25 minutes. Remove the foil and bake for an additional 10 minutes, or until the cheese is melted, bubbly, and golden brown around the edges. Let cool for 5 minutes before serving.

Notes

• I highly recommend using Diamond Crystal kosher salt; if you are using fine sea salt or table salt, cut the measurement in half (use 1/2 teaspoon instead of 1 teaspoon) to avoid over-salting.
• A pinch of freshly grated nutmeg contains oil-soluble flavor compounds that chemically enhance the dairy notes in the ricotta, making it taste richer without adding extra fat.
• Always cover the baking dish tightly with foil for the first 25 minutes of baking; this traps the steam to finish softening the pasta and prevents the cheese on top from burning before the center of the shells is heated through.
• After a day in the fridge, the pasta will absorb some of the moisture from the marinara sauce, making the shells even more tender and flavorful, though you may want to splash a tablespoon of water over them before reheating.
• To prevent the cooked shells from sticking together while you prepare the filling, spread them out in a single layer on a parchment-lined baking sheet rather than leaving them piled in a colander.

Serving Suggestions

These baked shells are incredibly rich and satisfying, making them the perfect centerpiece for a cozy family dinner. Pair them with simple, bright sides to balance the heavy cheese.

• A side of warm, crusty Homemade Garlic Bread to scoop up any leftover marinara sauce.
• A crisp, bright green salad tossed with a simple vinaigrette to cut through the richness of the cheese.
• Roasted broccoli or asparagus spears seasoned with lemon zest and parmesan.
• A glass of light, acidic red wine like Chianti or Pinot Noir to balance the heavy dairy.

Storage and Reheating

Leftover stuffed shells keep beautifully in an airtight container in the refrigerator for up to 4 days. In fact, many people find they taste even better the next day as the flavors meld.

If you want to freeze them, it is best to do so before baking. Assemble the shells completely in a freezer-safe dish, wrap tightly with a double layer of plastic wrap and aluminum foil, and freeze for up to 3 months. When you are ready to eat, bake them directly from frozen at 375°F, adding an extra 15 to 20 minutes to the covered baking time.

Reheating cooked leftovers requires a gentle touch to keep the cheese from turning rubbery.

Place individual portions in a microwave-safe dish, splash with a teaspoon of water or extra marinara, and microwave on medium power in 1-minute bursts. Alternatively, reheat the entire dish in a 350°F oven, covered with foil, for about 15 minutes until hot.

Ingredient Substitutes

If you don't have all the ingredients on hand, here are a few easy swaps that work beautifully without ruining the dish:

1. Spinach: You can substitute the frozen spinach with fresh baby spinach (about 10 ounces) that has been sautéed in olive oil and squeezed dry, or swap it entirely for cooked, chopped kale or Swiss chard.
2. Ricotta: If you can't find good ricotta, cottage cheese that has been pulsed in a food processor until smooth makes an excellent high-protein substitute.
3. Marinara: Any high-quality tomato-based pasta sauce will work, or you can use a rich meat sauce if you prefer a non-vegetarian version.
4. Mozzarella: Provolone or Monterey Jack can be used in place of the mozzarella for a similarly gooey, melted cheese topping.

This is one of those dishes that feels like a warm hug at the end of a long week. I hope it brings as much joy to your table as it does to mine—just remember to squeeze that spinach, and don't worry if a little cheese ends up on your cabinets!