Spinach Stuffed Pasta Shells
There’s something so cozy about a casserole full of cheesy, herby, spinach-packed pasta shells. This Spinach Stuffed Pasta Shells recipe is a weeknight hero and a potluck showstopper—comforting, straightforward, and endlessly satisfying. Using jumbo pasta shells stuffed with a ricotta-spinach filling and baked in a blanket of marinara and melted mozzarella, this dish feeds a crowd and keeps leftovers that reheat beautifully.
Why you’ll love this recipe
This version doubles down on the creamy, cheesy center with 2 pounds of ricotta and three eggs to make the filling rich and stable. Frozen chopped spinach keeps things simple and accessible year-round, while shredded mozzarella and grated Parmesan create that irresistible golden top. It’s approachable for cooks of any skill level and can be prepped ahead—assemble, chill, and bake when guests arrive.
Ingredients
- 12 ounces jumbo pasta shells
- 2 pounds ricotta cheese
- 2 cups shredded mozzarella
- ¾ cup grated Parmesan, plus more for sprinkling over the dish
- 3 eggs
- ¾ teaspoon dried oregano
- ½ teaspoon salt
- ¼ teaspoon freshly ground black pepper
- 10-ounce package of frozen chopped spinach defrosted and squeezed dry
- 3 cups marinara sauce (jarred or homemade)
Equipment
- Large pot for boiling pasta
- Colander
- Mixing bowl
- Large spoon or rubber spatula
- 9×13-inch baking dish or similar
- Aluminum foil
- Oven preheated to 350°F (175°C)
Before you begin
Defrost the frozen spinach and squeeze out as much moisture as you can—excess water will make the filling runny. Preheat your oven to 350°F (175°C). Have your marinara sauce warmed slightly so it spreads easily.
Step-by-step directions
- Cook the pasta shells: Bring a large pot of salted water to a boil. Add 12 ounces jumbo pasta shells and cook until al dente according to package directions. Drain the shells in a colander and rinse briefly with cold water to stop cooking. Set the shells aside on a towel or sheet pan so they don’t stick together.
- Prepare the spinach: If you haven’t already, defrost the 10-ounce package of frozen chopped spinach and squeeze it dry in a clean kitchen towel or several layers of paper towels. You want as little water as possible so the filling stays thick.
- Make the filling: In a large mixing bowl, combine 2 pounds ricotta cheese, the squeezed-dry spinach, 2 cups shredded mozzarella, ¾ cup grated Parmesan, 3 eggs, ¾ teaspoon dried oregano, ½ teaspoon salt, and ¼ teaspoon freshly ground black pepper. Stir with a spoon or spatula until the mixture is evenly combined and the eggs are fully incorporated.
- Spread the sauce: Pour about 1 cup of the 3 cups marinara sauce into the bottom of a 9×13-inch baking dish and spread it into an even layer. This creates a saucy base so the shells don’t stick and bake with flavor.
- Stuff the shells: Using a spoon, fill each cooked pasta shell with a generous scoop of the ricotta-spinach mixture. Place each filled shell, seam side up, into the baking dish on top of the sauce. Arrange them in a single layer; they can sit close together but don’t need to be perfectly uniform.
- Top with sauce and cheese: Once all shells are filled and in the dish, spoon the remaining marinara sauce evenly over the tops of the shells. Sprinkle the remaining shredded mozzarella and any extra grated Parmesan over everything. If you like a bit more cheese, add a light sprinkle of Parmesan for a golden finish.
- Cover and bake: Cover the baking dish tightly with aluminum foil. Bake in the preheated 350°F (175°C) oven for 25 minutes. This allows the filling to set and the sauce to warm through.
- Finish uncovered: After 25 minutes, remove the foil and bake an additional 10 minutes, or until the cheese on top is melted and just starting to brown. If you prefer a deeper golden crust, broil on high for 1–2 minutes while watching carefully to avoid burning.
- Rest and serve: Remove the dish from the oven and let it rest for 5–10 minutes. This helps the filling set so the shells hold their shape when plated. Garnish with a little extra grated Parmesan if desired, then serve warm with a side salad or crusty bread.
Troubleshooting & tips
- Too much moisture in the filling? Make sure you squeeze the spinach very dry. If the ricotta seems watery, drain it in a fine-mesh sieve over a bowl for a few minutes.
- Shells falling apart? Cook the shells to just al dente. Overcooking makes them fragile and prone to splitting when you stuff them.
- Make-ahead option: Assemble the dish up to the point of covering with foil, then refrigerate for up to 24 hours. When ready to serve, add an extra 5–10 minutes to the covered baking time since the dish will be cold from the fridge.
- Freezing: Assemble the stuffed shells in a freezer-safe dish, cover tightly, and freeze for up to 2 months. Bake covered from frozen at 350°F (175°C) for about 45–55 minutes, then uncover and bake until bubbly and golden.
Serving suggestions
These Spinach Stuffed Pasta Shells pair beautifully with a crisp green salad, roasted vegetables, or simple garlic bread. For a lighter meal, serve two stuffed shells per person with a big side salad. For a heartier dinner, plan three to four shells per person.
Storage
Store leftovers in an airtight container in the refrigerator for up to 4 days. Reheat individual portions in the microwave or warm the entire dish in a 350°F (175°C) oven until heated through.
Final notes
This Spinach Stuffed Pasta Shells recipe is a reliable crowd-pleaser: creamy, savory, and forgiving. It’s perfect for family dinners, holiday sides, or potlucks. Use your favorite marinara—jarred for convenience or homemade for an extra-flavorful result—and don’t be shy with the cheese. The combination of ricotta, mozzarella, and Parmesan gives the filling structure and the top that irresistible golden finish.
Enjoy these cheesy, spinach-filled shells hot from the oven, and savor how perfectly simple ingredients come together to make something comforting and memorable.
Spinach Stuffed Pasta Shells
Ingredients
Equipment
Method
- Bring a large pot of salted water to a boil and cook the jumbo shells according to package directions until al dente; drain and rinse with cool water to stop cooking, then set aside to cool.
- Preheat the oven to 350°F (175°C) and lightly grease a 9 x 13-inch baking dish.
- In a large bowl, combine the ricotta, shredded mozzarella, 3/4 cup grated Parmesan, eggs, dried oregano, salt, black pepper, and the well-drained spinach; mix until evenly combined.
- Spread about 1 cup of the marinara sauce in the bottom of the prepared baking dish to coat the surface.
- Spoon about 2 tablespoons of the cheese-and-spinach filling into each cooled shell, then place the filled shells in the baking dish in a single layer.
- Pour the remaining marinara sauce evenly over the filled shells and sprinkle additional grated Parmesan over the top if desired.
- Cover the dish with aluminum foil and bake for about 35 minutes, until heated through and bubbly; remove foil for the last 5 minutes if you want a slightly browned top.
- Let the casserole rest for 5 minutes before serving.
Notes
- Be sure to squeeze the thawed spinach well to avoid a watery filling.
- Cook shells just until al dente so they hold the filling.
- Use low-sodium sauce if you want to control saltiness.
- You can prepare the filling ahead and refrigerate before stuffing.
