Mary Berry Recipes

Home / Dinner / Classic Creamy Fish Pie with a Golden Potato Topping

There's a certain magic that happens when you combine the bounty of the sea with the comforting embrace of a creamy sauce and a golden potato topping. A classic fish pie, to my mind, is one of those truly special dishes that warms the soul and delights the palate. It's a proper British institution, and I simply adore it.

My recipe for this beloved dish is wonderfully straightforward, focusing on fresh, quality ingredients that sing together in harmony. We'll use a delightful mix of white fish and perhaps some smoked haddock for that lovely depth of flavour, all nestled in a beautifully seasoned white sauce. It’s not overly complicated, dear, but the results are simply magnificent.

This isn't just a meal; it's an occasion, a real family favourite that guarantees clean plates and happy faces. It’s the perfect supper for a chilly evening, or indeed, any time you crave a little culinary hug. Follow these steps, and you’ll create a fish pie that will be talked about for weeks!

Why You'll Love This Recipe

Combines delicate fish with a rich, savoury sauce for incredible flavour and comfort.
The crispy, golden mashed potato topping provides a delightful textural contrast to the creamy filling.
A versatile and wholesome dish, easily adaptable with different fish or vegetable additions.

Ingredients

500g mixed fish fillets (e.g., cod, haddock, salmon, smoked haddock), skinned and cut into 2-3cm chunks
300ml full-fat milk (for poaching)
2 bay leaves
6 black peppercorns
50g unsalted butter (for sauce)
50g plain flour
150g frozen peas
2 tbsp fresh parsley, chopped
1 tbsp fresh dill, chopped (optional)
Salt and freshly ground black pepper to taste
1kg Maris Piper or King Edward potatoes, peeled and cut into chunks
50g unsalted butter (for mash)
50ml full-fat milk (for mash, or a splash more if needed)
1 egg yolk
A pinch of nutmeg, freshly grated
2 tbsp grated Cheddar cheese (optional, for a cheesy crust)

Equipment Needed

Large saucepan • Wide, shallow pan (or another large saucepan) • Slotted spoon • Fine sieve • Whisk • 2-litre ovenproof dish (approx. 25x20cm) • Potato masher • Baking tray

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Step-by-Step Instructions

**Prepare the Fish:** Place the fish fillets in a wide, shallow pan. Pour over the 300ml milk, add the bay leaves and peppercorns. Bring gently to a simmer over a medium heat, then immediately remove from the heat, cover, and let stand for 5-7 minutes, or until the fish is just cooked through and flakes easily. Do not boil vigorously.
**Strain the Milk:** Carefully lift the fish out of the pan with a slotted spoon and set aside. Strain the poaching milk through a fine sieve into a jug, discarding the bay leaves and peppercorns. This infused milk is crucial for our sauce!
**Make the Sauce:** In the same pan (or a clean saucepan), melt the 50g butter over a medium heat. Stir in the 50g plain flour and cook for 1-2 minutes, stirring constantly, to create a roux. Gradually whisk in the strained, warm poaching milk, a little at a time, until you have a smooth, thick sauce. Bring to a gentle boil, then reduce the heat and simmer for 2-3 minutes, stirring, until the sauce has thickened beautifully. Season generously with salt and pepper.
**Assemble the Filling:** Gently fold the cooked fish chunks, frozen peas, chopped parsley, and dill (if using) into the creamy sauce. Taste and adjust seasoning if necessary. Pour the filling into a 2-litre ovenproof dish.
**Prepare the Potato Topping:** While the sauce is simmering, cook the peeled potato chunks in a large pan of salted boiling water for 15-20 minutes, or until very tender. Drain thoroughly and return to the hot pan.
**Mash the Potatoes:** Add the 50g butter, 50ml milk, egg yolk, and grated nutmeg to the drained potatoes. Mash until perfectly smooth and creamy. Season with salt and pepper to your liking.
**Top the Pie:** Spoon the mashed potato evenly over the fish filling, spreading it right to the edges of the dish. You can create a lovely pattern with a fork for an appealing finish. If using, sprinkle the grated Cheddar cheese over the top.
**Bake:** Place the dish on a baking tray (to catch any spills) and bake in a preheated oven at 200°C (180°C fan/Gas Mark 6) for 35-40 minutes, or until the topping is gloriously golden brown and the filling is bubbling invitingly around the edges.
**Serve:** Let the pie stand for 5-10 minutes before serving. This allows the filling to settle beautifully. Serve piping hot with some lovely green vegetables.

Perfect Substitutions

**Fish:** Feel free to use any firm white fish you enjoy. Prawns or scallops can also be added for extra luxury.
**Herbs:** Chives or tarragon can be lovely alternatives to parsley and dill.
**Milk:** For a lighter sauce, you can use semi-skimmed milk, but full-fat does give a wonderfully rich texture.
**Potato Topping:** Sweet potato mash or a mix of potato and celeriac mash can be a delicious variation.
**Cheese Topping:** Parmesan or Gruyère would also work beautifully instead of Cheddar.

Serving Suggestions

This comforting fish pie is a complete meal in itself, but it truly shines when served alongside some vibrant green vegetables. Steamed broccoli, tenderstem broccoli, green beans, or a simple side salad with a light vinaigrette would be absolutely perfect. A glass of crisp white wine, such as a Sauvignon Blanc or a dry Chardonnay, would complement the creamy richness beautifully. If you enjoyed this, you might also love our Classic Salmon En Croûte with a Creamy Dill Filling and Hearty Venison Casserole with Juniper and Red Wine.

How to Store \u0026 Reheat

Leftover fish pie can be stored, covered, in the refrigerator for up to 2-3 days. This pie freezes wonderfully! Allow the cooked pie to cool completely, then cover tightly with foil or transfer to a freezer-safe container. It can be frozen for up to 3 months. Thaw overnight in the refrigerator before reheating. To reheat, place the pie (covered loosely with foil to prevent the topping from drying out) in a preheated oven at 180°C (160°C fan/Gas Mark 4) for 25-30 minutes, or until piping hot all the way through. If reheating from frozen, it will take longer, around 45-60 minutes, ensuring it's thoroughly heated. If the topping needs crisping, remove the foil for the last 10 minutes.

Mary's Secrets to Success

Always use the freshest fish you can find; it makes all the difference to the flavour and texture of your pie. Don't skip poaching the fish in milk with bay leaves and peppercorns – this infuses the milk with wonderful flavour, which then becomes the base of your sauce; it’s a small step that yields big results! For truly luxurious mashed potato, ensure your potatoes are cooked until very tender, drained thoroughly, and then mashed with warm milk and butter. The egg yolk adds richness and helps with that lovely golden colour. Taste your sauce and your mash as you go; proper seasoning elevates all the individual elements of the pie. Finally, allowing the pie to rest for a few minutes after baking helps the sauce to settle and makes for easier, neater serving. Patience is a virtue, even with a hungry family!

Frequently Asked Questions

Can I prepare this pie ahead of time?

Absolutely, dear! You can assemble the entire pie, right up to the point of baking, and store it covered in the refrigerator for up to 24 hours. Just add an extra 10-15 minutes to the baking time when cooking from chilled.

How do I prevent the fish from becoming dry?

The key is gentle poaching. By simmering the fish in milk and then letting it stand off the heat, you ensure it cooks through delicately without becoming tough or dry. Don't overcook it at this stage, as it will cook further in the oven.

What if I don't like smoked haddock?

No problem at all! You can simply use 500g of white fish like cod, pollock, or hake. The smoked haddock adds a lovely depth of flavour, but the pie will still be utterly delicious without it.

Can I add vegetables to the filling?

Indeed you can! Finely diced leeks, spinach (squeezed dry), or even some sweetcorn would be lovely additions. Just be sure not to overcrowd the filling, as we want the fish and sauce to truly shine.

My potato topping isn't getting golden brown. What can I do?

For a beautiful golden crust, ensure your oven is at the correct temperature. You can also brush the top lightly with a little melted butter or milk before baking, or even pop it under a hot grill for a minute or two at the very end, keeping a very close eye on it, of course!