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Baked Haddock with Onions and Herbs

This baked haddock recipe is so simple and delicious. There’s great flavor from fresh herbs and lemon, plus it’s ready to eat in no time.

Craving seafood and want a simple dish? This baked haddock recipe will hit the spot. You only need a few ingredients and about 15 minutes to get this tasty fish on the table.

Scroll down to read more about how it all comes together or click here to jump straight down to the recipe.

Baked Haddock on a foil covered sheet pan, topped with fresh dill and lemon slices.

Substitutions For Haddock

If you don’t have access to haddock (or would just prefer a different fish), substitute in another mild white fish. Try this recipe with cod, tilapia, or halibut. 

Keep in mind the thickness when choosing your fish fillets though, even haddock fillets can vary in thickness a bit. It’s recommended to cook fish to an internal temperature of 145°F, which you can check with an instant read thermometer in the thickest part. A good rule of thumb is 10 minutes of baking time per inch of thickness.

How To Bake Haddock

This recipe is really simple to put together and the chopped onions and dill add a great flavor to the haddock. So so delicious.

If your fish still has the skin on it, start by removing the fish skin. Also get that oven preheating to 425°F. 

Place your fish on a sheet pan lined with foil. Pour melted butter with chopped onion over the fish and sprinkle with salt and pepper. Bake until the fish is cooked through, about 10 minutes. It should be opaque and flake easily with a fork. Finally, top with fresh dill and lemon slices. It’s just that easy!

Want to switch things up? Try using fresh parsley instead of the dill. Or go for a crispy baked haddock topped with seasoned bread crumbs, like in this fish from frozen recipe. I definitely suggest lemon wedges or a squeeze of lemon juice at the end though.

More Tasty Seafood Recipes

If you loved this simple haddock recipe, try some of these other great seafood recipes too.

Podcast Episode About Making Baked Haddock

Listen to me explain briefly about how to make this recipe, with some great tips along the way, by clicking the play button below:

Listen to more Recipe of the Day episodes here.

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Baked Haddock with herbs and onion

Baked Haddock Recipe

Contributor: Christine Pittman

Use all your knife skills to make this baked haddock with chopped onions and herbs.

  • Author: Christine Pittman
  • Prep Time: 5 minutes
  • Cook Time: 10 minutes
  • Total Time: 15 minutes
  • Yield: 4 servings 1x
  • Category: Entrée
  • Method: Baked
  • Cuisine: American

Ingredients

Units Scale
  • 1 lb. haddock fillet, skin removed (here’s how to do it)
  • 2 Tbsp. butter, melted
  • 2 Tbsp. chopped onion
  • Salt
  • Pepper
  • 2 Tbsp. chopped dill
  • 1 lemon, sliced

Instructions

  1. Preheat your oven to 425°F and line a baking sheet with aluminum foil. Place fish on sheet pan.
  2. In small bowl, combine melted butter and onion. Pour over fish and sprinkle lightly with salt and pepper.
  3. Bake in oven until cooked through and the fish flakes apart, about 10 minutes.
  4. Top the fish with chopped dill and lemon slices to serve.

This post originally appeared in October 2016 and was revised and republished in August 2023.