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When the butter-softened onion, celery, and bell pepper hit the saucepan, the kitchen starts to smell like the beginning of a good gravy. I wanted that familiar pot-pie comfort, but with seafood that stays tender instead of getting stirred around in a simmering filling. This Cajun seafood pot pie keeps the crab in the sauce and lets the shrimp and cod cook gently beneath a puff pastry lid.

The filling gets its body from a quick butter-and-flour roux, then seafood stock and cream turn it into a savory sauce before it ever reaches the baking dish. That means the fish and shrimp don’t have to sit in a bubbling saucepan while the gravy thickens. The finished pie comes out with golden, flaky pastry over a creamy Cajun filling and pieces of seafood you can still pick out in every serving.

Why the Seafood Goes Into the Dish Raw, Not Into the Saucepan

It’s easy to think the seafood should simmer in the sauce while it thickens, but that gives the shrimp extra time on the heat before the pie even reaches the oven. Here, the sauce thickens on its own first. The crab is folded into that finished sauce, while the raw shrimp and cod go straight into the baking dish. Spoon the sauce over the seafood and let the oven cook everything together beneath the pastry.

That division also helps the pieces keep their shape. Shrimp can turn firm and tight if they’re cooked for too long, and cod flakes apart more readily once it’s done. Arrange the seafood in an even layer so the sauce covers it without leaving a pile of pieces in the center. The oven does the final cooking, and the crust gives the filling a sheltered space to bubble until the pastry is golden.

The Stock, Roux, and Seafood Each Have a Job

• Seafood stock — This gives the sauce its savory seafood backbone without competing with the crab, shrimp, and cod. Unsalted stock is worth choosing because Cajun seasoning brings its own saltiness; a basic store-bought seafood stock works well here.
• Butter and flour — Together they make the roux that thickens the filling before it goes into the oven. Cook the flour for its full minute so the sauce doesn’t taste raw. There isn’t another listed ingredient that can do the same thickening job.
• Heavy cream — Cream rounds out the stock and gives the sauce a rich, smooth texture. A carton from the dairy case is fine; a thinner liquid won’t give you the same body.
• Cajun seasoning and dried thyme — Cajun blends vary in salt and heat, so use a blend you already enjoy. The thyme adds an earthy note behind the seasoning rather than making the filling taste like plain cream gravy.
• Crab, shrimp, and cod — Pick through the lump crab carefully for shell fragments, and use raw peeled and deveined shrimp so they’re ready to arrange in the dish. Cod cut into similarly sized pieces cooks more evenly than a mix of tiny pieces and large chunks.
• Puff pastry — One sheet gives the pie its crisp, airy lid without adding another dough-making step. Thaw it until pliable but keep it cold; pastry that has become warm and floppy is harder to lay neatly over the dish.

Build the Filling First, Then Let the Oven Finish the Seafood

Soften the Cajun Trinity

Heat the oven to 400°F with a rack in the center. Melt the butter in a 3-quart saucepan over medium heat, then add the onion, celery, and green bell pepper. Cook for 6 to 8 minutes, stirring occasionally, until the vegetables have softened; if they still feel crisp, give them another moment within that range. Stir in the garlic and cook for 30 seconds, just until fragrant.

Thicken the Stock and Cream

Stir the flour into the vegetables and cook for 1 minute. Gradually whisk in the seafood stock, working out any lumps before adding more; the mixture should look smooth rather than pasty. Whisk in the cream, Cajun seasoning, thyme, salt, and pepper, then simmer for 3 to 5 minutes while stirring. The sauce is ready when it thickens enough to coat a spoon instead of running like broth.

Layer the Seafood Beneath the Pastry

Fold the crabmeat into the sauce without breaking up every lump. Arrange the raw shrimp and cod in an even layer in a 2-quart baking dish, then spoon the sauce over them. Lay the thawed-but-cold puff pastry over the dish, trim the excess, and press the edges to seal. Cut three small vents in the top, beat the egg with the water, and brush the pastry with the egg wash.

Bake Until the Crust Is Golden

Bake for 25 to 30 minutes, until the pastry is puffed and golden and the filling is bubbling. Check the center of the largest piece of cod; it should reach 145°F, and the shrimp should be opaque. If the top turns golden before the seafood is ready, keep baking until those doneness cues are met. Rest the pie for 10 minutes before serving so the bubbling filling can settle.

Three Small Changes for a Different Seafood Balance

Questions That Come Up Before This Pot Pie Goes in the Oven

Cajun Seafood Pot Pie

Cajun seafood pot pie pairs crab, shrimp, and cod in a creamy Cajun-seasoned sauce beneath puff pastry. The filling is simmered on the stovetop, then baked until the pastry is puffed and golden and the seafood is cooked through.

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Prep Time 25 minutes mins

Cook Time 45 minutes mins

resting 10 minutes mins

Total Time 1 hour hr 20 minutes mins

Servings: 6 servings

Course: Dinner

Cuisine: Cajun

Calories: 400

Ingredients Equipment Method Notes

Ingredients

  

For the filling

• 4 tbsp unsalted butter
• 1 cup yellow onion finely chopped
• 0.75 cup celery finely chopped
• 0.75 cup green bell pepper finely chopped
• 2 cloves garlic minced
• 0.33 cup all-purpose flour
• 1.5 cup unsalted seafood stock
• 0.5 cup heavy cream
• 1 tbsp Cajun seasoning
• 0.5 tsp dried thyme
• 0.25 tsp kosher salt
• 0.25 tsp black pepper
• 4 oz lump crabmeat picked over for shells
• 8 oz raw extra-large shrimp peeled and deveined
• 8 oz cod cut into 1 1/2-inch pieces

For the crust

• 1 puff pastry sheet from a 17.3-ounce package, thawed but cold
• 1 egg large
• 1 tbsp water

Equipment

• 1 3-quart saucepan
• 1 2-quart baking dish

Method

 

Make the filling

1. Heat the oven to 400°F with a rack in the center.
2. Melt the butter in a 3-quart saucepan over medium heat.
3. Add the onion, celery, and bell pepper and cook for 6 to 8 minutes, stirring occasionally, until softened.
4. Add the garlic and cook for 30 seconds.
5. Stir in the flour and cook for 1 minute.
6. Gradually whisk in the seafood stock until smooth.
7. Whisk in the cream, Cajun seasoning, thyme, salt, and pepper.
8. Simmer for 3 to 5 minutes, stirring, until thickened.
9. Fold the crabmeat into the sauce.

Top and bake

1. Arrange the shrimp and cod in an even layer in a 2-quart baking dish.
2. Spoon the sauce over the shrimp and cod.
3. Lay the puff pastry over the dish and trim excess pastry.
4. Press the pastry edges to seal.
5. Cut 3 small vents in the top.
6. Beat the egg with the water.
7. Brush the pastry with the egg wash.
8. Bake for 25 to 30 minutes, until the pastry is puffed and golden, the filling bubbles, and the center of the largest cod piece reaches 145°F and the shrimp are opaque.
9. Rest for 10 minutes before serving.

Notes

Keep the puff pastry cold until topping the dish for a better puff. Refrigerate leftovers for up to 3 days; freezing is not recommended because the pastry can lose its texture. For a gluten-free variation, use gluten-free flour and puff pastry.