This dish became my celebration staple the first winter I wanted to impress my family without spending half the day in the kitchen. I discovered this combination on a rainy evening when heavy cream and pantry seafood met an open bottle of cognac, and the flavors transformed into something deeply comforting and slightly indulgent. The filling—lump crab and chopped shrimp folded into melted cream cheese, Old Bay and lemon—strikes a perfect balance between sweet shellfish and gently spicy warmth. The texture is creamy yet has bite from the shrimp, while the sauce brightens everything with tomato and a whisper of cognac.

I make these shells for small dinner parties and quiet Sunday suppers alike. What makes them special is the contrast: pillowy jumbo shells, a luxurious filling that’s slightly loose so it melds with sauce, and a gratin of freshly grated Parmesan on top. Every time I bring the casserole to the table, people lean in to get that first spoonful straight from the pan. The dish is adaptable, quick to assemble with cooked shells, and impressive enough for guests — a true weeknight-to-hosting bridge.

Ingredients

• Lump crabmeat (8 oz): Look for refrigerated lump crab for best texture — not the canned pink stuff. Gently pick through for shells and keep pieces chunky to highlight the seafood flavor.
• Shrimp (8 oz): Use raw shrimp, peeled and deveined, then roughly chop. Medium-sized shrimp work well; they add texture without overpowering the crab.
• Cream cheese (8 oz): Full-fat, cubed so it melts quickly. I use Philadelphia for consistent creaminess.
• Old Bay seasoning (1 tbsp): The signature blend for seafood — adds celery and pepper notes that complement crab and shrimp.
• Heavy cream (3/4 cup): Adds silkiness to the tomato sauce; substitute half-and-half for a lighter sauce, but it will be thinner.
• Tomato purée (28 oz can): Provides a bright, tomato base that balances the richness. San Marzano-style purée offers a sweeter, cleaner flavor.
• Cognac (1/2 cup): Deglazes the pan and gives fragrant depth. Any decent brandy or cognac works; don't use low-quality liquor.
• Jumbo pasta shells (6 oz; about 20 shells): Cooked until very al dente so they finish tender in the oven without getting mushy.
• Parmesan (1/2 cup freshly grated): Use Parmigiano-Reggiano for the best nutty finish on top.
• Garlic, onion, butter, lemon, red pepper flakes, parsley: These aromatics and finishing touches lift the entire dish — fresh is always best.

Instructions

Preheat the oven: Set the oven to 350°F. Lightly oil or butter a 9x13-inch casserole dish so the shells won’t stick and the sauce forms a nice base. Preheating ensures even baking and that the cheese melts uniformly. Cook the seafood and build the filling: In a nonstick skillet over medium heat, add a thin layer of neutral oil. Sauté the chopped shrimp, lump crabmeat and 2 minced garlic cloves for about 2 minutes — shrimp should just turn pink. Add juice from 1/2 lemon to brighten flavors. Add cubed cream cheese and stir until fully melted, about 3–4 minutes; keep the heat moderate to prevent separation. Season with 1 tablespoon Old Bay, 1 tablespoon chopped parsley, 1 teaspoon red pepper flakes and salt and pepper to taste. Remove from heat and adjust seasoning. The filling should be creamy but not watery so it nests neatly in shells. Sauté aromatics and make the sauce: In a deep skillet, melt 2 tablespoons butter over medium heat. Add remaining 2 minced garlic cloves and 1 small diced yellow onion; cook until translucent and soft, about 4–5 minutes. Stir in 1/4 cup tomato paste and cook for 2–3 minutes until it darkens slightly and begins to stick to the pan—this caramelization adds depth. Carefully deglaze with 1/2 cup cognac (stand back from the pan), bringing to a simmer and reducing by roughly half to concentrate flavor and burn off alcohol. Add the 28-ounce can tomato purée and 3/4 cup heavy cream, stir to combine, and simmer until slightly thickened, about 5 minutes. Stir in remaining red pepper flakes and parsley; season with salt and pepper. Assemble the dish: Spread a thin layer of sauce across the bottom of the prepared casserole dish. Using a small spoon, stuff each cooked jumbo shell with the crab–shrimp filling—fill until full but avoid overstuffing so the shells maintain shape. Nestle the stuffed shells seam-side up into the sauce. Pour any remaining filling juices over the shells for extra moisture. Top and bake: Grate 1/2 cup fresh Parmesan evenly over the shells. Bake in the preheated oven until the cheese melts and sauce bubbles along the edges, 20–25 minutes. Remove and let rest for 5 minutes; garnish with additional chopped parsley and a light dusting of red pepper flakes before serving.

Storage Tips

Allow the casserole to cool to room temperature before storing. For refrigeration, transfer to an airtight container or cover the dish tightly with plastic wrap; maintain at 40°F or below and use within 3 days. For longer storage, freeze in a freezer-safe casserole dish or portion into airtight containers; label with date and freeze up to 3 months. To preserve texture when reheating from frozen, thaw in the refrigerator overnight, then bake covered at 350°F for 25–30 minutes until heated through. Avoid overcooking to keep shrimp tender and avoid grainy dairy.

Ingredient Substitutions

If crab is cost-prohibitive, substitute extra shrimp or a firm white fish like halibut or cod (flaked). For a lower-fat version, use reduced-fat cream cheese and half-and-half instead of heavy cream; note the sauce will be slightly thinner. Omit cognac if you prefer or replace with 1/2 cup dry white wine or brandy—reduce to concentrate flavor. For a gluten-free option, use gluten-free jumbo shells or substitute large cooked zucchini boats for stuffing.

Serving Suggestions

Pair the casserole with a crisp arugula or mixed-green salad dressed simply with lemon and olive oil to cut through the richness. Steamed green beans or sautéed broccolini with garlic complement the seafood. For a special occasion, serve with a chilled glass of unoaked Chardonnay or a light, citrusy Sauvignon Blanc. Garnish with extra parsley, lemon wedges and an optional drizzle of high-quality olive oil for a polished finish.

Cultural Background

Stuffed pasta has Italian roots — stuffed shells, manicotti and cannelloni are classic formats — but seafood-stuffed shells reflect coastal American tastes, where crab and shrimp are celebrated. Adding Old Bay evokes Mid-Atlantic seasoning traditions, while the cognac-tomato-cream sauce nods to French technique, creating a hybrid that’s distinctly American comfort food with European refinement.

Seasonal Adaptations

In summer, lighten the sauce with more fresh tomatoes and less cream, and add basil instead of parsley. For winter gatherings, increase Parmesan and add a sprinkle of smoked paprika for warmth. Holiday menus can feature this as a luxurious main—make it ahead and simply bake before guests arrive to keep hosting stress-free.

Meal Prep Tips

Prepare the filling and sauce up to one day ahead and store separately in the refrigerator. Cook shells and cool on a sheet tray to prevent sticking. Assemble just before baking, or assemble and cover tightly and refrigerate—bake an extra 5–10 minutes if chilled. Portion into individual dishes for make-ahead lunches or elegant reheatable dinners.

Bring this casserole to your next family dinner or small gathering and enjoy the way it brings people together — creamy, comforting, and just a touch indulgent. Make it your own by adjusting heat, swapping herbs, or adding a crunchy breadcrumb topping for texture.