Mastering Fish Finger Pie: A Complete Cooking Guide

There’s something wonderfully nostalgic about fish fingers, those golden, crispy bites many of us grew up with. This recipe takes that childhood favorite and gives it a cozy upgrade by layering fish fingers with baked beans, creamy mashed potatoes, and a blanket of melted cheddar.

It’s the kind of dish that’s easy to throw together on a busy evening yet feels like pure comfort when it comes bubbling out of the oven.

If you’re ready to jump straight into cooking, scroll to the recipe card below or use the table of contents to find what you need quickly.

Ingredients You’ll Need

Here’s everything you’ll need to make this fish finger pie. I’ve added a few small details so you know exactly what works best:

• 8–10 fish fingers (fish sticks) – cook them until golden and crisp before layering (cod or haddock fingers work great).
• 1 pound (500 g) floury potatoes – Russet or Yukon Gold are best for a fluffy mash.
• 1 medium onion (about 100 g) – thinly sliced for a sweet, savory base.
• 1 can (14 oz / 400 g) baked beans – classic tomato-based beans add sauciness and flavor.
• 1/2 cup (125 ml) vegetable stock – keeps the bean layer moist.
• 4 tablespoons (50 g) unsalted butter – half for the mash, half for richness.
• 2 tablespoons milk, warmed – makes the mash creamy (warm milk prevents gluey potatoes).
• 1 cup (100 g) sharp cheddar cheese, shredded – divided between the mash and topping.
• 1 tablespoon vegetable oil – for sautéing the onion.
• 1/2 teaspoon black pepper – plus extra salt to taste.
• Optional add-ins: 1/2 to 1 cup frozen peas, 1 teaspoon Worcestershire sauce, or 1 teaspoon Dijon mustard for extra depth.

Step-by-Step Instructions

Step 1: Preheat and Cook the Fish Fingers

Set your oven to 425°F (220°C). Place the fish fingers on a baking sheet and cook according to the package instructions until golden and crispy. Once done, let them cool slightly, then cut them into bite-sized chunks. This helps them hold their texture inside the pie.

Step 2: Boil and Mash the Potatoes

While the fish fingers are baking, peel and cube the potatoes into 1-inch chunks. Boil them in salted water for about 20 minutes, or until tender when pierced with a fork. Drain well and let them steam dry for a minute. Mash with half the butter, the warm milk, half of the shredded cheddar, and a good pinch of salt and pepper. The mash should be smooth, fluffy, and creamy.

Step 3: Prepare the Bean and Onion Base

Heat the vegetable oil in a saucepan over medium heat. Add the sliced onion and cook until soft and lightly golden. Stir in the baked beans and vegetable stock, letting it simmer gently for a few minutes. This will be the flavorful base layer of the pie. If you’re adding peas, Worcestershire, or Dijon, fold them in here.

Step 4: Assemble the Pie

In an ovenproof baking dish, spread the bean mixture evenly across the bottom. Scatter the chopped fish finger pieces over the beans. Top with the cheesy mashed potatoes, spreading it carefully to cover the filling.

Step 5: Add Cheese and Bake

Sprinkle the remaining shredded cheddar over the mash. Bake in the oven at 400°F (200°C) for 15–20 minutes, until the top is golden and the filling is bubbling at the edges.

Step 6: Broil and Rest

For extra crispiness, switch to the broiler for 1–2 minutes until the top develops golden-brown peaks. Let the pie rest for 5 minutes before serving so the layers hold together nicely.

Fish Finger Pie

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• Author: Maya Marin
• Total Time: 50 minutes
• Yield: 4 servings 1x

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Description

This fish finger pie is a comforting casserole made with crispy fish fingers, baked beans, creamy mashed potatoes, and a cheesy golden topping. Perfect for a quick family dinner.

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Ingredients

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• 8–10 fish fingers (fish sticks), cooked until crisp
• 1 pound (500 g) floury potatoes, peeled and cubed
• 1 medium onion (100 g), thinly sliced
• 1 can (14 oz / 400 g) baked beans
• 1/2 cup (125 ml) vegetable stock
• 4 tablespoons (50 g) unsalted butter
• 2 tablespoons milk, warmed
• 1 cup (100 g) sharp cheddar cheese, shredded, divided
• 1 tablespoon vegetable oil
• 1/2 teaspoon black pepper
• Salt, to taste
• Optional: 1/2 to 1 cup frozen peas, 1 teaspoon Worcestershire sauce, 1 teaspoon Dijon mustard

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Instructions

1. Preheat oven to 425°F (220°C). Bake fish fingers until golden and crisp, then cut into chunks.
2. Boil potatoes in salted water until tender, about 20 minutes. Drain, then mash with butter, warm milk, half the cheese, salt, and pepper.
3. Heat oil in a pan and cook onions until soft. Stir in baked beans and vegetable stock, simmer briefly. Add optional peas or seasonings if desired.
4. Spread bean mixture in a baking dish. Scatter chopped fish fingers on top.
5. Cover with mashed potatoes, spreading evenly to seal the filling.
6. Sprinkle remaining cheese over the mash.
7. Bake at 400°F (200°C) for 15–20 minutes until golden and bubbling at the edges.
8. Broil 1–2 minutes for extra crispiness. Rest 5 minutes before serving.

Equipment

Non-Stick Round Pie Dish

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Nonstick Saucepan

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Potato Ricer and Masher

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Notes

• For best texture, bake fish fingers until extra crisp before layering.
• You can assemble the pie ahead and refrigerate for up to 24 hours before baking.
• Leftovers keep well for 2–3 days in the fridge.

• Prep Time: 15 minutes
• Cook Time: 35 minutes
• Category: Seafood
• Method: Baking
• Cuisine: British

Nutrition

• Serving Size: 1 portion
• Calories: 509
• Sugar: 5 g
• Sodium: 820 mg
• Fat: 14 g
• Saturated Fat: 5 g
• Unsaturated Fat: 7 g
• Trans Fat: 0 g
• Carbohydrates: 64 g
• Fiber: 8 g
• Protein: 26 g
• Cholesterol: 55 mg

Pro Tips for the Best Fish Finger Pie

• Get the fish fingers extra crispy. Bake them on a wire rack instead of directly on the tray. This allows heat to circulate and keeps them crunchy even after baking in the pie.
• Steam-dry the potatoes before mashing. After draining, let the potatoes sit in the pot for a minute so excess moisture evaporates. This makes the mash fluffier and prevents watery topping.
• Rough up the mash surface. Use a fork to create ridges and peaks before baking. These little edges catch the heat and turn into golden, crispy bits that everyone fights over.

And here’s a fun fact: the British sometimes call this kind of dish “a proper tea-time pie” because it feels like both dinner and comfort in one bite.

Wrapping It Up

Fish finger pie proves that simple ingredients can come together into something truly comforting. With crispy fish fingers, a saucy bean base, and creamy mash topped with golden cheddar, it’s the kind of dish that feels both nostalgic and satisfying.

It’s easy to make, budget friendly, and flexible enough to adapt with your favorite add-ins. Give it a try on a busy weeknight or as a cozy weekend dinner.

If you do make it, I’d love to hear how it turned out for you, drop your thoughts in the comments below. Until then, happy cooking!