This baked cod is served with a fresh mango salsa made with lime, red onion, cilantro, and a little jalapeño. The mild, flaky fish balances the fruit’s sweetness, while citrus and spice keep the dish bright rather than sugary; it makes an easy centerpiece for a weeknight meal or a relaxed dinner with guests.
Ingredients
- 1½ lb skinless cod fillets (680 g), preferably four portions of similar thickness
- 1 tbsp olive oil (15 ml), for the fish
- ¾ tsp fine salt (4 g)
- ¼ tsp freshly ground black pepper (0.5 g)
- ½ tsp ground cumin (1 g)
- ½ tsp sweet paprika (1 g)
- 1 large ripe mango, peeled and diced to make about 1½ cups (250 g diced flesh)
- ¼ cup finely diced red onion (40 g)
- ½ cup finely diced cucumber (about 60 g)
- 1 small jalapeño, seeded and finely minced (about 10 g), or less to taste
- 2 tbsp fresh lime juice (30 ml), divided
- ¼ cup chopped fresh cilantro leaves and tender stems (10 g)
- 1 tsp olive oil (5 ml), for the salsa
- 1 lime, cut into wedges, for serving (about 100 g)
Instructions
- Heat the oven and prepare the pan. Set a rack in the middle of the oven and heat it to 425°F (220°C). Line a rimmed baking sheet with parchment paper, or lightly oil the pan. While the oven heats, prepare the salsa and season the fish; the preheating time overlaps with that prep, so it does not add a separate waiting period to the recipe.
- Make the mango salsa. In a medium bowl, combine the diced mango, red onion, cucumber, jalapeño, cilantro, 1½ tablespoons (22 ml) of the lime juice, and 1 teaspoon (5 ml) olive oil. Stir gently so the mango stays in pieces. Taste a small spoonful and add the remaining ½ tablespoon (8 ml) lime juice if you want a sharper, more citrus-forward salsa. Set it aside while you prepare the cod. If the mango is very firm, let the salsa sit at room temperature while the fish bakes so its juices can mingle; do not leave it out for more than two hours.
- Dry and season the cod. Pat the fillets dry on all sides with paper towels. This helps the seasoning cling and prevents excess water from collecting on the baking sheet. Arrange the pieces with a little space between them. Rub the tops with 1 tablespoon (15 ml) olive oil, then sprinkle evenly with the salt, black pepper, cumin, and paprika. If one end of a fillet is much thinner, tuck it under slightly so the piece is closer to an even thickness.
- Bake until safely cooked. Bake the cod for 12–14 minutes, depending on the thickness of the portions. Check the thickest part with an instant-read food thermometer: USDA FSIS guidance sets the safe minimum internal temperature for fish at 145°F (63°C). The flesh should also look opaque and separate easily into flakes, but use the thermometer rather than appearance alone to confirm doneness. If a thinner piece reaches temperature first, remove it and return any thicker pieces to the oven for a few minutes.
- Plate and serve. Transfer the hot cod carefully to plates, spoon the mango salsa over or alongside the fillets, and serve with lime wedges. Keep some salsa separate until serving if you want the fish’s lightly spiced surface to stay visible. The salsa is cool and juicy against the warm fish, so add it at the table rather than baking it on top.
Tips
- Choose mango by ripeness, not color alone. A ripe mango should yield slightly to gentle pressure and smell fruity near the stem. If yours is firm and tart, dice it small and add lime gradually; a little extra finely chopped mango or cucumber can balance a particularly sharp salsa. Avoid fruit that is mushy or fermented-smelling.
- Use fillets of similar thickness. Cod portions often vary, and the thin tail end can dry out before the thick center cooks through. Fold a thin end under itself, or remove individual portions as they reach 145°F (63°C). A thermometer inserted sideways into the thickest section can make checking a thin fillet easier.
- Keep the fish dry and handle it gently. Patting the cod dry helps the oil and spices coat it evenly. Cod is delicate, so use a thin spatula to lift it from the pan and avoid turning it during baking. If the fillets release a little liquid, that is normal; drain it from the plate before adding the salsa if you prefer a less saucy presentation.
- Adjust heat and acidity in small steps. Jalapeños differ in heat, so start with a little and add more after tasting. Lime also varies in sharpness. Mix the salsa before making final adjustments, and remember that the onion’s flavor becomes more noticeable as it sits.
Serving Suggestions
Serve the cod as soon as it comes out of the oven, with a generous spoonful of salsa and a lime wedge on each plate. Steamed rice, coconut rice, or quinoa makes a mild base that catches the mango and lime juices. For a more substantial plate, add black beans or a simple pot of pinto beans; their earthy flavor works well with the sweet fruit and cumin-seasoned fish.
For a lighter-feeling meal, pair the cod with roasted vegetables, grilled zucchini, or a crisp cabbage slaw. A salad of lettuce, avocado, and thinly sliced radish is another good match, especially if dressed simply with lime and oil. Warm corn tortillas can turn the leftovers—or freshly cooked fillets—into fish tacos. Flake the fish into large pieces, add salsa just before eating, and offer extra lime and sliced jalapeño at the table. Keep wet toppings separate until serving so the tortillas do not become soggy.
Variations
Use another mild white fish. Haddock, pollock, or halibut can stand in for cod. Choose portions of roughly the same thickness and check each one with a thermometer because cooking time changes with both fish type and shape. Halibut is often thicker and may need longer; thin pollock may cook sooner. The salsa and seasoning quantities can remain the same for about 1½ pounds (680 g) of fish.
Make the salsa without cilantro. If cilantro is not to your taste, use 2 tablespoons (about 6 g) chopped flat-leaf parsley, or leave the herb out and add a little extra cucumber. Parsley gives a greener, less distinctive aroma, while omitting herbs makes the mango, lime, and onion flavors more prominent. For a softer onion flavor, rinse the diced red onion briefly under cold water and drain it well before mixing.
Change the spice profile. Replace the cumin and paprika with ½ teaspoon (1 g) mild chili powder, or add a pinch of cayenne for more heat. For a smoky note, use smoked paprika in place of sweet paprika. Start with a small amount of hot spice: it is easy to add heat at the table, but difficult to take it out of the salsa or seasoning once mixed.
Try a quick stovetop method. If you do not want to heat the oven, cook similarly thick fillets in a lightly oiled nonstick skillet over medium heat. Cook without moving them until the underside is lightly golden, turn carefully, and continue until the thickest part reaches 145°F (63°C). Timing depends on thickness and pan heat, so use the thermometer. This method gives the fish a more browned surface than baking; keep the salsa separate and spoon it over only when serving.
Storage and Reheating
Refrigerate cooked cod and mango salsa within two hours of cooking or serving. Store them in separate airtight containers so the salsa does not make the fish watery. The cooked fish keeps for 3–4 days in the refrigerator at 40°F (4°C) or below, and the salsa is best within about 2 days for its freshest texture. If the salsa has been sitting out for more than two hours, discard it rather than returning it to the refrigerator.
For best texture, reheat only the cod you plan to eat. Place it in a covered oven-safe dish with a teaspoon of water, and warm it in a 300°F (150°C) oven until the center reaches 165°F (74°C). You can also microwave it in short bursts in a covered dish, checking between bursts to avoid overheating. Reheated fish may be less moist than freshly cooked fish, so add fresh salsa after warming, not before. Do not reheat the fish more than once.
Freezing is possible, although the cod may be softer after thawing and the fresh salsa does not freeze well. Freeze cooled fish promptly in a freezer-safe, airtight container for up to 2 months for best quality. Thaw it in the refrigerator, then reheat to 165°F (74°C). Make a fresh batch of salsa after thawing rather than freezing the mango, cucumber, and onion mixture, which can turn watery.
Frequently Asked Questions
Can I use frozen cod?
Yes. Thaw it in the refrigerator overnight, then pat it thoroughly dry before seasoning. If you need to cook it from frozen, follow the package directions where available and expect a longer, less predictable cooking time; check the thickest part of every portion with a food thermometer and remove each piece when it reaches 145°F (63°C). Do not judge doneness by the timing for thawed fillets.
Can I make the mango salsa ahead?
Yes. You can mix it up to a day ahead and refrigerate it in a covered container. The flavors will blend, but the cucumber may release liquid and the mango can soften. For the freshest texture, prepare the salsa a few hours ahead, keep it chilled, and stir it gently before serving. If making it well in advance, add the cilantro shortly before serving.
How do I know when cod is done?
Check the thickest portion with an instant-read thermometer; fish is safely cooked at 145°F (63°C), the USDA FSIS safe minimum. Properly cooked cod is opaque and flakes when gently pressed with a fork, but those visual signs are less reliable than temperature, especially with thick pieces. Insert the thermometer into the center of the fillet, avoiding the pan.
What if my mango is not ripe?
A slightly firm mango can still work, especially if diced small, but it will be less sweet and juicy. Taste it before assembling the salsa and add lime little by little, since extra acidity can make an underripe mango taste sharper. If the fruit is very hard, use a ripe peach or nectarine instead; the flavor will be less tropical, but the fruit still provides a sweet, fresh contrast to the fish.
Can I prepare this as fish tacos?
Yes. Bake the cod as directed, then break it into large flakes after it has reached 145°F (63°C). Fill warm corn or flour tortillas with fish, mango salsa, and shredded cabbage or lettuce. Keep the salsa and any creamy sauce separate until the tacos are assembled, and serve promptly so the tortillas stay intact.
Can I cook the cod and salsa together?
It is better to bake the cod on its own and add the salsa afterward. Fresh mango and cucumber release moisture in the oven, which can leave the fish sitting in liquid and soften the salsa’s crisp texture. Adding it at the end also preserves the bright lime and cilantro flavors. If you would like a warm fruit topping, serve the salsa at room temperature rather than heating it with the fish.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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