Creamy, cheesy, and loaded with tender lump crab meat, this Baked Crab Pasta is the ultimate comfort food for seafood lovers. Al dente pasta is tossed with sautéed vegetables, rich sour cream, flavorful seasonings, and sweet crab before being topped with a generous layer of Swiss and cheddar cheese. Baked until hot and bubbly, it’s a hearty family dinner that’s surprisingly easy to prepare.

Why You’ll Love This Recipe

• Loaded with Crab Meat – Every bite is filled with tender, flavorful lump crab.
• Ultra Creamy Texture – Sour cream creates a rich, velvety sauce without being overly heavy.
• Golden Cheesy Topping – Swiss and cheddar melt into a bubbly, irresistible crust.
• Perfect Make-Ahead Meal – Assemble ahead of time and bake when ready to serve.
• Simple Everyday Ingredients – Uses pantry staples and fresh vegetables.
• Ideal for Family Dinners – Comforting, satisfying, and easy to feed a crowd.

Ingredients You’ll Need

For the Pasta Bake

• 16 ounces penne pasta – Holds the creamy sauce beautifully while staying tender after baking.
• 16 ounces lump crab meat – Provides sweet, delicate seafood flavor and hearty texture.
• 14 ounces sour cream – Creates a rich, creamy base for the casserole.
• 1 bell pepper, diced – Adds sweetness, color, and freshness.
• 1 onion, diced – Builds savory flavor throughout the dish.
• 4 tablespoons unsalted butter – Used to sauté the vegetables while adding richness.
• ¾ teaspoon dried oregano – Brings subtle herbaceous flavor.
• ¾ teaspoon garlic powder – Adds deep savory notes.
• ½ teaspoon salt – Enhances every ingredient.
• ½ teaspoon black pepper – Adds gentle warmth.
• ¼ teaspoon smoked paprika – Gives a mild smoky depth.

For the Topping

• 4 ounces Swiss cheese, freshly grated – Melts smoothly with a mild nutty flavor.
• 4 ounces cheddar cheese, freshly grated – Adds richness, sharpness, and a golden finish.
• Sliced green onions – Fresh garnish that balances the richness.

Step-by-Step Instructions

Step 1: Prepare the Ingredients

Preheat your oven to 350°F (175°C).

Dice the onion and bell pepper into small bite-sized pieces. Freshly grate both the Swiss and cheddar cheeses for the smoothest melt.

Step 2: Cook the Pasta

Bring a large pot of generously salted water to a boil.

Cook the penne according to the package directions until al dente. Since it will continue cooking in the oven, avoid overcooking.

Drain well and set aside.

Step 3: Sauté the Vegetables

Melt the butter in a large skillet over medium heat.

Add the diced onion and bell pepper and cook for 5–7 minutes, stirring occasionally until softened and lightly caramelized.

Add the oregano, garlic powder, salt, pepper, and smoked paprika. Stir continuously for about 30 seconds until fragrant.

Step 4: Mix Everything Together

In a large mixing bowl, combine the cooked pasta with the sautéed vegetables and all of the seasoned butter.

Add the lump crab meat and gently fold it into the pasta to keep the crab pieces intact.

Stir in the sour cream until every piece of pasta is evenly coated in the creamy mixture.

Step 5: Assemble the Casserole

Transfer the mixture to a greased 9×13-inch baking dish.

Spread it into an even layer.

Top evenly with the grated Swiss and cheddar cheeses.

Step 6: Bake

Bake for approximately 20 minutes, or until the cheese is fully melted, bubbling around the edges, and lightly golden on top.

Step 7: Garnish and Serve

Allow the casserole to rest for 2–3 minutes before serving.

Sprinkle sliced green onions over the top for a burst of fresh flavor and color.

Serve immediately while hot and creamy.

Recipe Notes & Tips

• Use Lump Crab Meat – Larger pieces provide the best texture and presentation.
• Freshly Grate the Cheese – Fresh cheese melts much smoother than pre-shredded varieties.
• Cook Pasta Al Dente – It will continue cooking in the oven and stay perfectly tender.
• Don’t Overmix the Crab – Fold gently to keep the beautiful chunks intact.
• Season the Pasta Water – Properly salted water adds flavor from the very beginning.
• Let It Rest Before Serving – A few minutes of resting helps the casserole set for easier serving.

Nutritional Information

• Prep Time: 20 minutes
• Cook Time: 35 minutes
• Total Time: Approximately 57 minutes
• Servings: 6 servings
• Calories: Approximately 3,150 calories (as provided in the original recipe; actual calories per serving may vary depending on ingredient brands and portion size).

Perfect Pairings

• Garlic Bread – Perfect for soaking up every bit of the creamy sauce.
• Crisp Caesar Salad – Adds freshness and crunch alongside the rich pasta.
• Roasted Asparagus – A light vegetable side that complements the seafood.
• Fresh Lemon Wedges – Brighten the rich flavors with a squeeze of citrus.

Ideal Occasions

• Family Dinner – A hearty meal everyone will enjoy.
• Holiday Gatherings – An elegant seafood casserole for special occasions.
• Potluck Parties – Travels well and feeds a crowd.
• Weekend Comfort Food – Perfect for cozy evenings at home.

Storage & Serving Tips

• Refrigerate Leftovers – Store in an airtight container for up to 3 days.
• Reheat Gently – Warm in a 325°F oven or microwave until heated through.
• Freeze Before Baking – Assemble the casserole, wrap tightly, and freeze for up to 2 months.
• Add Fresh Garnish After Reheating – Sprinkle with fresh green onions before serving.

Creative Variations to Try

• Add Shrimp – Combine shrimp and crab for an even richer seafood bake.
• Spicy Version – Mix in diced jalapeños or crushed red pepper flakes.
• Extra Veggies – Add mushrooms, spinach, or broccoli for additional flavor and nutrition.
• Different Cheese Blend – Try mozzarella, Gruyère, or Monterey Jack for a new twist.

Troubleshooting Common Issues

• Pasta Is Too Soft – Be sure to cook it only until al dente before baking.
• Sauce Seems Too Thick – Add a splash of milk or seafood stock before baking.
• Cheese Browns Too Quickly – Cover loosely with foil during the final minutes if necessary.
• Crab Falls Apart – Fold it gently into the mixture instead of stirring vigorously.

Why This Recipe Works

This Baked Crab Pasta succeeds because it balances rich, creamy ingredients with the naturally sweet flavor of lump crab meat. Sour cream creates a luxurious sauce without the need for a traditional roux, while sautéed onions and peppers build layers of savory sweetness. Freshly grated Swiss and cheddar cheeses melt into a beautifully golden topping that adds both creaminess and depth of flavor. Cooking the pasta until just al dente ensures it remains perfectly tender after baking, and the final sprinkle of green onions adds freshness that cuts through the richness. The result is a comforting seafood casserole that’s creamy, flavorful, and satisfying from the first bite to the last.

Final Thoughts

This Baked Crab Pasta is the perfect combination of creamy comfort food and elegant seafood dining. It’s simple enough for a weeknight dinner yet impressive enough to serve guests during holidays or celebrations. Every forkful delivers tender pasta, sweet crab, flavorful vegetables, and a bubbly cheese topping that makes this casserole unforgettable. If you’d like a lighter version, substitute Greek yogurt for part of the sour cream, use reduced-fat cheese, or add extra vegetables while still enjoying the rich, comforting flavors that make this baked pasta such a crowd-pleaser.