Mary Berry’s Fish Pie Recipe: Buttery Crust with Creamy Seafood Filling

This dish brings comfort food to new heights with a creamy seafood filling encased in a perfectly golden crust.

I’ve refined the technique to ensure the fish stays tender while the sauce achieves that signature velvety texture Mary Berry is known for.

Ingredients for Mary Berry Fish Pie

Fresh seafood and a handful of pantry staples create this luxurious comfort classic.

The fish quality makes this dish. Whole Foods or a trusted fishmonger will have the freshest cod, haddock, and shrimp—look for firm, translucent flesh with no fishy odor. Smoked haddock adds depth (undyed is ideal), but unsmoked works too. For the crust, Dufour puff pastry is the gold standard if you can find it. Always thaw it overnight in the fridge, never at room temperature.

No shrimp? Scallops or mussels add great texture. Out of leeks? Substitute with shallots or onion. Heavy cream is non-negotiable for that velvety texture, but half-and-half with a cornstarch slurry works in a pinch. The Dijon mustard balances the richness—whole-grain mustard gives a rustic twist. Fresh parsley brightens everything up, but dried at one-third the amount is fine.

Assemble and bake immediately—don’t let the pastry sit. Leftovers keep for 2-3 days in the fridge, though the crust softens. Reheats best in a 350°F oven for 10-15 minutes. Freeze unbaked pies for up to 1 month (thaw before baking).

Step-by-Step Instructions for Buttery Crust with Creamy Seafood Filling

Here’s my proven method for achieving a velvety sauce and perfectly golden pastry every time.

Step 1: Prepare and Poach the Seafood

Cut the 1.5 lb white fish fillets and 0.5 lb smoked haddock fillet into 1-inch chunks. Place them in a large saucepan with the 0.5 lb large shrimp. Add the 0.5 cup whole milk and enough water to just cover the seafood.

Bring to a gentle simmer over medium heat for 5-7 minutes until the fish flakes easily and the shrimp turn opaque. Avoid boiling, as this can make the seafood tough. Once cooked, carefully drain the seafood, reserving the poaching liquid, and set aside.

Step 2: Make the Creamy Sauce Base

In a clean saucepan, melt 4 tbsp unsalted butter over medium heat. Add the thinly sliced 1 whole leek and cook for 3-4 minutes until softened but not browned. Stir in the 0.25 cup all-purpose flour to form a smooth roux.

Gradually whisk in the reserved poaching liquid along with the 1.5 cups heavy cream. Bring to a gentle simmer, stirring constantly, until the sauce thickens enough to coat the back of a spoon, about 5-6 minutes. Stir in the 1 tbsp Dijon mustard, 1 tbsp lemon juice, 1 tsp salt, and 0.5 tsp black pepper.

Step 3: Combine Seafood and Sauce

Gently fold the cooked seafood into the creamy sauce, ensuring all pieces are well coated. Take care not to break up the fish chunks. The sauce should envelop the seafood completely, creating a luxurious, velvety texture that’s the hallmark of this dish.

Transfer the mixture to a 2-quart baking dish and spread it out evenly. This ensures even cooking when the pie goes into the oven. Let the filling cool slightly while you prepare the pastry topping.

Step 4: Add the Puff Pastry Topping

Roll out the 1 sheet puff pastry sheet on a lightly floured surface to a size slightly larger than your baking dish. Brush the edges of the dish with a bit of water to help the pastry adhere, then lay the pastry over the filling, pressing gently at the edges to seal.

Trim off any excess pastry and crimp the edges with a fork. Cut a few small slits in the center to allow steam to escape during baking. Brush the entire surface with a beaten 1 whole large egg for a beautiful golden finish.

Step 5: Bake to Golden Perfection

Preheat your oven to 400°F. Bake the pie for 25-30 minutes until the pastry is puffed and deep golden brown. The filling should be bubbling slightly around the edges when it’s done.

Remove from the oven and let it rest for 5-10 minutes before serving. This allows the filling to set slightly, making it easier to serve neat portions. Garnish with chopped 0.25 cup fresh flat-leaf parsley for a pop of color and freshness.

Pro Cooking Tips for This Dish

Perfect Poaching Technique

Gentle heat is key when poaching the seafood—never let it boil. I use medium heat and watch for tiny bubbles at the edges. This keeps the 1.5 lb white fish and 0.5 lb smoked haddock tender and prevents the 0.5 lb shrimp from turning rubbery. 🌡️

Roux Mastery

Cook your roux for exactly 2 minutes after adding the 0.25 cup flour to the melted 4 tbsp butter. This removes the raw flour taste without browning it. The leeks should be soft but still pale—browned leeks can darken your sauce.

Sauce Consistency

Your sauce should coat the back of a spoon but still drip slowly. If it’s too thick, whisk in 1-2 tbsp of the reserved poaching liquid. If too thin, simmer for another 1-2 minutes. The 1.5 cups heavy cream gives that signature Mary Berry richness.

Pastry Preparation

Always use ice-cold puff pastry—I keep mine in the fridge until the last moment. Roll it to ⅛-inch thickness on a floured surface. For extra shine, brush with egg wash twice: once before baking and once at the 15-minute mark.

Baking Precision

Bake on the middle rack at 400°F for even browning. Rotate the dish halfway through if your oven has hot spots. The pie is done when the pastry is deep golden and the filling bubbles at the edges.

Resting Time

That 5-10 minute rest is non-negotiable. It lets the filling thicken slightly so it doesn’t run out when sliced. I use this time to chop the 0.25 cup parsley and set the table. 💡

Frequently Asked Questions