Jul 14 2026
RestaurantsThe Porthole Restaurant & PubHaddock Sliders Recipe

Haddock Sliders Recipe

Time40m
Serves4

Make Haddock Sliders Recipe in just 40m. Get the full recipe with step-by-step instructions at pekinthechef.com.

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Ingredients

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Fish & Sliders

Garnish & Finishing

Method

Fish & Sliders

  1. 1

    Prepare haddock

    Pat the haddock fillets dry with paper towels. Trim any thin edges so pieces are roughly uniform (about 3–4 oz each). Cut the fillets into 8 pieces sized to fit the slider buns. Season both sides with 1 tsp kosher salt, 1/2 tsp black pepper, 1/4 tsp garlic powder, 1/4 tsp onion powder and 1/4 tsp smoked paprika.

  2. 2

    Set up breading station

    Place the flour in a shallow bowl and stir in the cornstarch (if using) and a pinch of salt. In a second bowl, whisk the eggs with the milk and remaining 1/2 tsp salt and 1/2 tsp black pepper. Place the breadcrumbs in a third shallow bowl.

  3. 3

    Bread the fish

    Dredge each seasoned haddock piece first in the flour, shaking off excess, then dip into the egg mixture, letting excess drip off, and finally press into the breadcrumbs to coat evenly. Place breaded pieces on a tray while you heat the pan.

  4. 4

    Cook the haddock

    Heat a large skillet over medium-high heat and add 2 tbsp olive oil. When oil shimmers, arrange breaded haddock pieces in a single layer (work in two batches if needed). Cook 3–4 minutes per side until golden brown and the fish flakes easily with a fork (internal temperature 145°F / 63°C). Transfer cooked pieces to a paper towel–lined plate and season lightly with a pinch of salt.

  5. 5

    Warm and butter buns

    While fish cooks, spread softened butter on cut sides of the mini buns. Place buns buttered-side down on a second skillet or in the oven at 350°F (175°C) for 3–5 minutes until lightly toasted and golden.

  6. 6

    Assemble sliders

    Spread about 1 tablespoon of the dill-caper mayo (see next section) on the bottom half of each warmed bun. Place a leaf of lettuce, then a cooked haddock piece, spoon a little more sauce on top (about 1/2 tbsp), add pickles or pickled onion if using, and finish with the top bun. Repeat for all 8 sliders.

Sauce & Garnish

  1. 7

    Make the dill-caper mayo

    In a small bowl combine 1 cup mayonnaise, 2 tbsp finely chopped fresh dill (or 1 tsp dried), 1 tbsp chopped capers, 2 tsp Dijon mustard, the zest of 1 lemon and 1–2 tsp lemon juice to taste. Season with 1/4 tsp salt and 1/4 tsp black pepper. Stir until smooth and refrigerate 10 minutes to let flavors meld.

  2. 8

    Finish & serve

    Arrange the assembled sliders on a platter. Garnish with lemon wedges and serve immediately while fish is hot and buns are slightly crisp.

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