Summary: Not all cod cuts work equally well in the oven. The key is to choose a thick, skin-on piece, which protects the flesh from direct heat and provides gelatin during cooking. Here's a summary by cut:
Baked cod is one of the most popular recipes in Spain, and at the same time, one of the easiest to prepare. With just a few ingredients, a good cut, and the right technique, you'll achieve a piece that's juicy on the inside, golden on the outside, and with a flavor reminiscent of traditional home cooking. In this comprehensive guide, we'll explain everything: from choosing the perfect cut to exact cooking times based on thickness, the most popular variations, and the tricks we've used daily at Mercat del Ninot since 1990.
The secret to good baked cod doesn't lie in exotic ingredients or complicated techniques. It's about respecting three things: the quality of the cod, proper desalting, and cooking times. If you master these three points, the result will be spectacular.
Which cod cut to choose for baking
Not all cod cuts work equally well in the oven. The key is to choose a thick, skin-on piece, which protects the flesh from direct heat and provides gelatin during cooking. Here's a summary by cut:
- Thick loin (3-4 cm thick): the best option for the oven. It's the thickest part of the cod, remains juicy, and flakes perfectly. Its high collagen content gives it that characteristic silky texture.
- Penca (rib cut): a whole piece with a central bone, ideal for slow baking at a slightly lower temperature (180 °C). Its bone structure adds extra flavor and a firm but tender texture.
- Suprema: a thick, boneless cut, perfect for elegant presentations. It's the best choice if you want to serve a restaurant-quality dish at home.
- Flakes and scraps: not recommended for direct baking (they dry out), but they work very well in preparations with sauce or gratins.
At Bacalalo, we work with desalted cod ready to cook, hand-cut in our workshop at Mercat del Ninot. All the cod we offer comes from Iceland, one of the best quality origins in the world due to its cold, clean waters.
Ingredients for 4 servings
- 4 desalted cod loins, 180-220 g each (skin-on)
- 4 medium potatoes (Monalisa or Kennebec type)
- 1 large onion
- 4 cloves of garlic
- 1 red bell pepper
- 100 ml extra virgin olive oil
- 1 glass of water or fish stock
- Salt (only for potatoes and vegetables; the cod already has the right amount)
- Freshly ground black pepper
- 1 teaspoon sweet paprika
- Fresh parsley
Note on salt: If you have properly desalted the cod, you won't need to add salt to it. Taste it before baking: it should have a pleasant saltiness, neither bland nor too salty.
Step-by-step preparation
1. Prepare vegetables and preheat (10 minutes)
Peel and slice potatoes into half-centimeter rounds. Cut the onion into thin julienne strips and the red bell pepper into one-centimeter strips. Slice the garlic. Preheat the oven to 200 °C with top and bottom heat, no fan. The fan dries out the cod.
2. Assemble the base in the baking dish (5 minutes)
Arrange the potatoes in a baking dish, forming an even layer. Scatter the onion and bell pepper over them. Drizzle generously with extra virgin olive oil, season the vegetables with salt and pepper, and sprinkle with sweet paprika. Add a glass of water or fish stock: this liquid will create steam inside the oven, keeping the potatoes tender and the cod hydrated.
3. Bake the vegetable base (20 minutes)
Place the baking dish on the central rack of the oven. Cook for 20 minutes until the potatoes are almost done and the onion begins to caramelize. This step is crucial: if you add the cod from the beginning, the vegetables will remain raw or the cod will be overcooked.
4. Prepare the cod in the meantime
Remove the cod from the refrigerator 15 minutes before baking to allow it to come to room temperature. Dry it thoroughly with paper towels on both sides, especially the skin. Surface moisture is the enemy of crispy skin: the drier it goes into the oven, the better the result.
5. Add the cod to the baking dish (12-15 minutes)
Remove the baking dish from the oven, place the cod loins skin-side up on top of the vegetables. Scatter the sliced garlic around. Drizzle the loins with a little olive oil. Return the dish to the oven and cook for 12-15 more minutes at 200 °C.
6. Final touch and plating
The cod is ready when the skin separates easily and the flesh flakes into white, opaque layers. If you see translucent areas, it needs 2-3 more minutes. Remove it from the oven immediately when ready: remember that it continues to cook for 2-3 minutes out of the oven from residual heat. Garnish with fresh chopped parsley and a drizzle of raw extra virgin olive oil.
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Baking times by cod thickness
Cooking time depends directly on the thickness of the piece. This table is the reference we use at Bacalalo:
- Thin fillets (1-2 cm): 8-10 minutes at 200 °C. Watch them closely, they overcook quickly.
- Standard loins (2-3 cm): 12-15 minutes at 200 °C. The most versatile cut.
- Thick loin or rib cut (3-5 cm): 18-22 minutes at 180 °C. Lower the temperature so that the heat reaches the center without burning the outside.
- Whole piece with bone: 25-30 minutes at 180 °C. Perfect for family meals, carved directly at the table.
General rule: allow 5-6 minutes per centimeter of thickness at 200 °C. If the piece is more than 3 cm, lower to 180 °C and add 30% more time.
7 tricks for perfect baked cod
- Dry it before baking: surface moisture prevents the skin from browning. Use paper towels and press gently. This step makes the difference between crispy skin and rubbery skin.
- Do not add salt to the cod: it already has the right amount from the salting process. Only season the vegetables at the base with salt and pepper.
- Skin-side up: the skin acts as a protective shield against direct heat. The subcutaneous fat melts into the flesh, keeping it juicy.
- Do not open the oven during cooking: every time you open the door, the temperature drops 20-30 °C, extending the cooking time, which dries out the fish.
- Remove it before it "looks" ready: cod continues to cook for 2-3 minutes out of the oven from residual heat (carry-over cooking).
- Bring the cod to room temperature before baking: take it out of the refrigerator 15 minutes beforehand. If it goes in cold, cooking will be uneven: overcooked on the outside and raw in the center.
- Use quality extra virgin olive oil: the oven amplifies flavors, and a good oil makes all the difference. Add a drizzle raw when serving.
Baked cod variations
Baked cod with tomato
Substitute the bell pepper with 4 ripe tomatoes cut into thick slices. Add a pinch of sugar to counteract the acidity. Roasted tomato caramelizes and creates a natural sauce that pairs perfectly with cod. This is one of the most popular variations and the base for many traditional dishes.
Baked cod Portuguese style
The Portuguese version adds black olives, sliced hard-boiled egg, and thinly sliced layered potatoes (patatas panaderas). It's drizzled with a good amount of olive oil and baked until the edges of the potatoes are crispy.
Baked cod with seasonal vegetables
In summer: zucchini, eggplant, cherry tomatoes, and red onion. In winter: leek, pumpkin, and mushrooms. Cut the vegetables into similar-sized pieces so they cook evenly.
Gratin baked cod
Bake the cod as usual, and during the last 2 minutes, activate the grill. Cover the loins with a mixture of breadcrumbs, chopped garlic, parsley, and oil. The result is a crispy crust that contrasts with the juicy interior.
Best side dishes
Baked cod is a versatile dish that pairs with a multitude of side dishes:
- Potatoes: roasted (in the same dish), in mashed potatoes with olive oil, or crispy pan-fried potatoes.
- Vegetables: roasted bell peppers, grilled green asparagus, pisto manchego, or Catalan escalivada.
- Salads: a fresh esqueixada as a starter before the warm cod.
- Sauces: homemade aioli, green sauce with parsley, or a lemon and herb vinaigrette.
- Legumes: sautéed chickpeas with spinach, stewed white beans, or warm lentils.
Common mistakes when baking cod
These are the most common mistakes we see, even in experienced cooks:
- Using too thin a cut: fillets less than 2 cm will be overcooked in minutes. If you only have thin pieces, lower the temperature to 180 °C and halve the cooking time.
- Not desalting correctly: incomplete desalting will ruin any recipe. The cod must be perfectly seasoned before baking.
- Adding cod at the beginning: if you bake everything together from the start, the vegetables will be raw or the cod completely dry. Always bake in two stages.
- Oven with fan: circulating air dries out the surface of the cod. Use static heat (top and bottom) unless you specifically want extra crispy skin.
- Forgetting to dry the cod: wet cod, when placed in the oven, "boils" in its own moisture instead of roasting. Always dry it with paper towels.
- Serving late: cod cools quickly and loses juiciness. Serve immediately after removing it from the oven.
How to store and reheat leftovers
If you have leftover baked cod, don't throw it away. Properly stored, it's still delicious:
- In the refrigerator: store in an airtight container for up to 2-3 days. Cover tightly to prevent it from absorbing odors.
- Reheating: in the oven at 150 °C for 8-10 minutes, with a drizzle of water or broth in the baking dish to prevent it from drying out. Never reheat it in the microwave: the cod's texture will become rubbery.
- Reusing: leftover baked cod is the perfect base for cod croquettes, warm salads, or an impromptu brandade.
If you need to store it longer, consult our cod storage guide.
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Conclusions
- Which cod cut to choose for the oven: Not all cod cuts work equally well in the oven.
- Ingredients for 4 people: Note on salt: if you have desalted the cod correctly, you will not need to add salt.
- Step-by-step preparation: Peel and cut the potatoes into half-centimeter slices.
- Oven times according to cod thickness: Cooking time depends directly on the thickness of the piece.
- 7 tricks for perfect oven-baked cod: Replace the pepper with 4 ripe tomatoes cut into thick slices.
Frequently asked questions about oven-baked cod
At what temperature should cod be baked?
At 200 °C for standard loins of 2-3 cm (12-15 minutes) or at 180 °C for thicker pieces like the penca (18-22 minutes). The lower temperature allows heat to reach the center without drying out the outside.
How to prevent oven-baked cod from drying out?
Three keys: choose a thick cut (minimum 2 cm), do not exceed the cooking time, and add liquid (water or broth) to the vegetable base to create steam that hydrates the fish during baking. 7 tricks for perfect oven-baked cod Dry it before baking: surface moisture prevents the skin from browning.
Can frozen cod be used for oven baking?
Yes, but you must first thaw it in the refrigerator for 12-24 hours. Never put it directly into the oven frozen: cooking will be uneven, the center will be raw, and the outside overcooked. The secret to good oven-baked cod is not in exotic ingredients or complicated techniques.
Is it necessary to desalt cod before baking?
If you use salted cod, yes, always. Consult our desalting table by thickness for exact times. If you buy already desalted cod like ours, it's ready to cook directly. Prepare the cod in the meantime Take the cod out of the refrigerator 15 minutes before baking to let it temper.
Can fresh cod be used instead of desalted cod?
Yes. Fresh cod works well in the oven, but the texture is different: softer and less firm than desalted cod. The salting and subsequent desalting process changes the protein structure and gives it that flaky texture that makes traditional cod so special.
How many calories are in oven-baked cod?
Oven-baked cod with vegetables is around 180-220 kcal per serving (not counting potatoes). Cod is one of the leanest fish: only 0.7 g of fat per 100 g, with a high content of protein (18-20 g) and omega-3. It is an ideal option for weight control diets.
Discover our selection of desalted cod loins ready to bake at Bacalalo.
→ Prepare it with Bacalalo products: Extra desalted cod loin | Extra desalted cod belly without bones
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