Baked Haddock with Onions and Herbs

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

Put your knife skills to the test! We’ve been explaining and showing you how to get the most out of your knives and now we’re going to challenge you to pull all those skills together for this easy seafood dish.

What Knife Skills Do I Need?

Did you miss some of our knife skills lessons? Here are our guides on how to cut an onion, how to chop herbs and how to skin a fish fillet.

Now that we’ve looked back over our notes, let’s get started.

What If I Can’t Find 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 of 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 Cook 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.

Start by preheating your oven to 425°F and placing your fish (skin removed) 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 buttery bread crumbs. I definitely suggest the lemon or a squeeze of lemon juice at the end though.

What to Serve with Baked Fish

A simple tossed salad is always a great pairing! These green beans bring out the lemon flavor and cook at the same temperature as the haddock, but you’ll want to start them before the fish. Or break out the air fryer and roast some delicious broccoli. Whatever you chose, it’s sure to be a delicious meal.

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Disclosure: This article is sponsored by Cutco. All opinions are ours and honest.

This post originally appeared in October 2016 and was revised and republished in March 2020.