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    Home » Recipes » Fish and seafood recipes

    Cheesy cod and broccoli bake

    Published: Jun 5, 2024 by VJ · This post may contain affiliate links · 1 Comment

    Jump to recipe

    This cheesy cod and broccoli bake is a super-simple recipe, perfect for a quick and easy mid-week meal. It's made with juicy cod fillets nestled on a bed of tender broccoli florets, smothered in a tasty cheese sauce and oven-baked until golden.

    Close up of a slice of baked cod on a spoonful of broccoli, covered in cheese sauce.

    This recipe was inspired by my other recipe for fish and rice bake in tomato sauce which is also baked in the oven. But whereas that is a tomato-based recipe, this cod and broccoli bake is made with a creamy cheese sauce.

    With plenty of broccoli and lots of tangy cheesy sauce, this fish bake is almost a complete meal in one dish. I like to serve it with this spicy mushroom rice, but it would be just as tasty served on a bed of creamy mashed potatoes. And if you don't have the time (or inclination) to cook a separate side dish, a simple green salad and a crusty bread roll will be more than sufficient.

    I love how the broccoli soaks up the cheese sauce as it bakes, yet still retains a slight crunch. If you prefer your broccoli to be more on the softer side, you could par-boil it first, but I don't find it necessary.

    The fish bakes to absolute perfection and turns out juicy and succulent, flaking easily with a fork. I used cod, but haddock or even salmon would work just as well in this recipe.

    For extra flavour I've included a finely sliced onion in the cheese sauce. And if you'd like to spice things up a little, a teaspoon of Dijon mustard would make a nice adddition.

    Overhead shot of a dish of cod and broccoldi bake covered in a cheesy sauce.

    Let me show you how easy it is to make

    Jump to:
    • Ingredients
    • Instructions
    • Tips for a perfect outcome
    • Serving suggestions
    • Variations
    • Equipment
    • Storage
    • FAQ
    • Save for later
    • Related recipes
    • 📋The recipe

    Ingredients

    For the cod and broccoli bake you will need the following ingredients:

    Ingredients for cheesy cod and broccoli bake.
    • Cod fillets - you will need one fillet per person. The recommended weight of each raw fillet should be 115 grams or 4 ounces, but if your family has a large appetite then you can obviously add more. If you are interested in portion control, the British Heart Foundation has some handy PDF documents you can download showing recommended portion sizes for various foods.
    • Broccoli - there is a whole head of broccoli in this recipe. The broccoli should be rinsed and broken into florets. Discard the centre stem or keep it to add to your next pot of soup or stew.
    • Onion - this is optional - if you don't want to add onions to the sauce you can leave it out or perhaps substitute it with a finely chopped leek. The onion should be finely sliced or diced.
    • Butter - this is used to saute the onion to soften it, and is also used as the base for the sauce.
    • Flour - used to thicken the sauce.
    • Milk - if you prefer an even creamier sauce you could use half milk and half single cream.
    • Grated cheese - used both in the sauce and for sprinkling on top of the cod bake before it goes into the oven. I used cheddar but you can use any cheese that melts well.
    • Salt and black pepper (not pictured) - for seasoning.
    • Dijon mustard - (not pictured and optional) - to add to the sauce.

    **You can find the complete list of ingredients and measurements on the printable recipe card at the end of this post**

    Instructions

    And this is how you make it:

    3 cod fillets on a bed of broccoli florets in a blue casserole dish.

    Step 1: Place the broccoli florets in the bottom of an oven-proof baking dish and arrange the fish fillets on top. Season the fillets lightly with salt and black pepper.

    Onions frying in butter in a white frying pan.

    Step 2: Fry the onions gently in butter until they turn translucent. Keep the heat low so that the onions don't brown.

    Flour mixed with softened onions.

    Step 3: Remove the onions from the heat and stir in the flour, taking care to remove any lumps.

    Milk added to the onions in a frying pan.

    Step 4: Return the pan to the heat and stir in the milk. Continue to stir on a low heat until the sauce starts to thicken.

    Grated cheese added to the sauce in a frying pan.

    Step 5: Stir in the grated cheese.

    Thickened sauce leaving a trail as a spatula is drawn through it.

    Step 6: Continue to cook over low heat, stirring continuously, until the sauce thickens and leaves a thin trail. Taste for seasoning and add salt if necessary. Stir in the mustard if using.

    Cheese sauce poured over cod and broccoli in a blue dish.

    Step 7: Pour the sauce over the fish and broccoli.

    Grated cheese sprinkled on the cod and broccoli before it goes into the oven.

    Step 8: Sprinkle with the grated cheese, cover the dish with tinfoil (or a lid if your dish has one) and bake at 180C / 350F for 25 minutes.

    The finished dish of cod and broccoli bake covered with golden melted cheese.

    Step 9: Remove the tinfoil and bake uncovered for a further 10 minutes or until the cheese is melted and golden.

    Tips for a perfect outcome

    Here are my top tips to ensure your meal turns out perfectly:

    • Cut the broccoli into evenly sized pieces so that they all cook at the same time.
    • If you are concerned that the broccoli won't cook to your liking in the oven, parboil it for 3 minutes (no longer) and drain it well before adding it to the baking dish.
    • Press the fish fillets gently with paper towel to blot up any excess moisture before placing them on top of the broccoli. This is especially important if your fish and been frozen and defrosted. Excess moisture in the fish will make the sauce turn 'runny' in the oven.
    • If you are not using onions in the sauce, simply melt the butter and stir in the flour before adding the milk.
    • If the sauce becomes too thick, thin it down with an extra splash of milk after the cheese has been added.
    • The sauce should leave a trail that closes slowly when you draw a spatula through it.
    • Cover the dish tightly with tinfoil (or a lid) for the first 25 minutes of cooking time. This will give the fish time to steam. If your fillets are on the thick side, you may need to add a few minutes to the cooking time. The fish will be cooked when it flakes easily with a fork.
    • Take care when removing the foil from the baking dish - the steam inside will be HOT!
    • The final few minutes of cooking time is to allow the cheese to melt. You may not need the entire 10 minutes.
    • Remember to season the dish to your taste.
    Overhead shot of a dish of cod and broccoli bake.

    Serving suggestions

    Serve with rice or creamy mashed potatoes (or even Irish Colcannon).

    If you would like to add other vegetables as side dishes, why not try one of these recipes:

    • Minted smashed peas
    • Glazed carrots
    • Buttered cabbage and leeks

    This cod and broccoli bake is also delicious when served with a fresh green salad and lots of crusty bread for mopping up the cheesy sauce.

    Variations

    Here are a few ideas for variations on the recipe that you may like to try:

    • Instead of using broccoli, why not make this dish with cauliflower florets (or a mixture of cauliflower and broccoli) instead. The cooking time will remain the same.
    • For a crunchy topping, combine breadcrumbs or a packet of crushed potato crisps with the cheese. I think cheese and onion flavoured crisps would be amazing.
    • I've mentioned mustard earlier, but I often add a teaspoon of Dijon mustard when I'm making cheese sauce - it adds a nice little kick without being too spicy.
    • Scatter a few shelled and deveined raw prawns on top of the broccoli before adding the fish. You can use frozen prawns, but defrost them first.

    Equipment

    As far as equipment goes, this is what you will need:

    • A baking dish large enough to hold the broccoli, fish and cheese sauce. For 4 people I used an 11" x 7" dish.
    • A large frying pan (or saucepan) for frying the onions and making the sauce.

    Storage

    You can assemble the dish the day before and leave it in a covered container in the refrigerator until you are ready to bake it.

    Leftovers can be stored in the refrigerator for 2 days. Warm them in the oven or in the microwave before serving.

    This dish is not suitable for freezing.

    FAQ

    Can I use other fish instead of cod?

    Yes any firm fish fillets will be suitable for this dish. I've made it successfully with both haddock and salmon. When making this fish bake with salmon I like to add a tablespoon of freshly chopped dill to the sauce.

    Save for later

    If you would like to try this cheesy cod and broccoli bake why not save the recipe to one of your Pinterest boards so you can find it easily? Just click on the image below.

    Alternatively, you can save the recipe by clicking on the floating heart icon on the right-hand side of the screen.

    Related recipes

    Visit my fish and seafood recipes page for other tasty fish recipes. Here are a few you might enjoy:

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      Seafood-stuffed pasta shells - in a creamy cheese sauce
    • Oven-baked Mediterranean cod on a plate, covered with marinara sauce, with peas and boiled potatoes.
      Mediterranean oven-baked cod with marinara sauce
    • A piece of salmon topped with cheesy breadcrumbs being flaked with a fork.
      Salmon and asparagus gratin with buttered noodles
    • Close up of a piece of monkfish on a fork with a plate of peas and potatoes in the background.
      Pan-fried monkfish with parsley butter

    📋The recipe

    Close up of a slice of baked cod on a spoonful of broccoli, covered in cheese sauce.

    Cheesy cod and broccoli bake

    This cheesy cod and broccoli bake is a super-simple recipe, perfect for a quick and easy mid-week meal. It's made with juicy cod fillets nestled on a bed of tender broccoli florets, smothered in a tasty cheese sauce and oven-baked until golden.
    Recipe by: Veronica
    Main Course
    British
    Calories 397
    Prep 5 minutes minutes
    Cheese sauce 15 minutes minutes
    Cook 35 minutes minutes
    Total Time 55 minutes minutes
    Servings: 4 people
    Print Pin Comment Bookmark Saved!
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    5 from 1 vote

    (Click the stars to rate this recipe)

    Equipment

    • Baking dish 11" x 7" approximately.
    • Large frying pan OR
    • Saucepan

    Ingredients

    • 1 pound / 450 grams cod fillets 4 fillets
    • 1 medium head broccoli cut into florets 3 to 4 cups approximately
    • ½ cup / 60 grams grated cheddar cheese for topping

    Sauce

    • 1 medium onion peeled and finely sliced or diced
    • 2 ounces / 60 grams butter
    • ¾ cup / 90 grams grated cheddar cheese
    • 3 tablespons / 25 grams flour
    • 2 cups / 480 ml milk
    • 1 teaspoon Dijon mustard optional
    • Salt and black pepper to taste for seasoning

    Instructions

    • Place the broccoli florets in the bottom of an oven-proof baking dish and arrange the fish fillets on top. Season the fish and the broccoli lightly with salt and black pepper to taste.
      1 pound / 450 grams cod fillets, 1 medium head broccoli cut into florets, Salt and black pepper to taste
    • Fry the onions gently in butter until they turn translucent. Keep the heat low so that the onions don't brown
      1 medium onion, 2 ounces / 60 grams butter
    • Remove the onions from the heat and stir in the flour, taking care to remove any lumps.
      3 tablespons / 25 grams flour
    • Return the pan to the heat and stir in the milk. Continue to stir on a low heat until the sauce starts to thicken.
      2 cups / 480 ml milk
    • Stir in the grated cheese.
      ¾ cup / 90 grams grated cheddar cheese
    • Continue to cook over low heat, stirring continuously, until the sauce thickens and leaves a thin trail. Taste for seasoning and add salt if necessary. Stir in the mustard if using.
      1 teaspoon Dijon mustard, Salt and black pepper to taste
    • Pour the sauce over the fish and broccoli.
    • Sprinkle with the grated cheese, cover the dish with tinfoil (or a lid if your dish has one) and bake at 180C / 350F for 25 minutes.
      ½ cup / 60 grams grated cheddar cheese
    • Remove the tinfoil and bake uncovered for a further 10 minutes or until the cheese is melted and golden.

    Notes

    Tips for a perfect result
    • Cut the broccoli into evenly sized pieces so that they all cook at the same time.
    • If you are concerned that the broccoli won't cook to your liking in the oven, parboil it for 3 minutes (no longer) and drain it well before adding it to the baking dish.
    • Press the fish fillets gently with paper towel to blot up any excess moisture before placing them on top of the broccoli. This is especially important if your fish and been frozen and defrosted. Excess moisture in the fish will make the sauce turn 'runny' in the oven.
    • If you are not using onions in the sauce, simply melt the butter and stir in the flour before adding the milk.
    • If the sauce becomes too thick, thin it down with an extra splash of milk after the cheese has been added.
    • The sauce should leave a trail that closes slowly when you draw a spatula through it.
    • Cover the dish tightly with tinfoil (or a lid) for the first 25 minutes of cooking time. This will give the fish time to steam. If your fillets are on the thicker side, you may need to add a few minutes to the cooking time. The fish will be cooked when it flakes easily with a fork.
    • Take care when removing the foil from the baking dish - the steam inside will be HOT!
    • The final few minutes of cooking time is to allow the cheese to melt. You may not need the entire 10 minutes.
    Substitutions
    You can substitute the cod for haddock, salmon or other firm-fleshed fish of your choice.

    Nutrition

    Calories - 397kcal | Carbohydrates - 11.7g | Protein - 29.8g | Fat - 26g | Saturated Fat - 16.4g | Cholesterol - 148mg | Sodium - 622mg | Potassium - 191mg | Fiber - 1.4g | Sugar - 4g | Vitamin D - 13µg | Calcium - 370mg | Iron - 1mg

    I am not a nutritionist. The nutrition information has been calculated using an on-line calculator, and is intended for information and guidance purposes only. If the nutrition information is important to you, you should consider calculating it yourself, using your preferred tool.

    Unless otherwise stated, a cup is the standard US cup containing 240 ml. In all my recipes this cup is assumed to hold 140g of flour. For help converting other ingredients between cups, grams, ounces and other measures, see my recipe conversion calculator.
    All my recipes are developed and tested at sea-level. For tips on adjusting recipes for high altitudes see my post on baking at high altitudes.
    Tried this recipe?If you made this recipe I'd love it if you could leave me a comment and let me know how it went!
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    About VJ

    Before I started my food blog I was an IT Consultant. Now that I've swapped an office for a kitchen I have a lot more time to spend on things that interest me such as trying out new recipes. Most of my cooking is based around quick and easy meals, mostly made from scratch, using everyday pantry ingredients.

    Comments

      5 from 1 vote

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    1. VJ says

      June 05, 2024 at 4:24 pm

      5 stars
      This recipe takes only 20 minutes to put together (including in the sauce) then it's hands off while it bakes in the oven!

      Reply
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