A whole salmon fillet is a skin-on side of salmon baked with lemon, garlic, olive oil, and fresh herbs until tender and flaky. At 400°F (204°C), a roughly 2-pound (900 g) fillet usually needs about 18 minutes, but thickness and a thermometer reading matter more than weight alone.
Ingredients
- 1 whole skin-on salmon fillet, about 2 lb (900 g), pin bones removed
- 1 tablespoon olive oil (15 ml)
- 1 teaspoon fine salt (5 g)
- ½ teaspoon freshly ground black pepper (1 g)
- 1 medium lemon (about 110 g), half thinly sliced and half cut into wedges
- 2 garlic cloves (about 6 g), finely grated or minced
- 2 tablespoons chopped fresh dill (6 g), plus extra for serving
- 1 tablespoon chopped fresh parsley (4 g), optional
Instructions
- Heat the oven and prepare the pan. Set a rack in the center of the oven and heat it to 400°F (204°C). Line a rimmed baking sheet with parchment paper or foil. Use a pan large enough to hold the salmon flat without folding the tail under. The oven can heat while you prepare the fish, so preheating does not add a separate wait to the stated total time.
- Check and dry the salmon. Pat the fillet dry on both sides with paper towels; do not rinse raw fish, since splashing can spread germs around the sink. Run your fingers lightly over the flesh to check for pin bones and pull out any you find with clean tweezers. Leave the skin on: it helps hold the side together and makes the cooked fish easier to lift from the pan.
- Season the flesh. Put the salmon skin-side down on the prepared sheet. Rub the olive oil over the flesh, then sprinkle it evenly with salt and pepper. Scatter the garlic and chopped dill over the top. Lay the lemon slices across the fillet, spacing them so most of the fish remains uncovered and can roast rather than steam beneath a thick layer of citrus.
- Bake until it reaches a safe temperature. Put the pan in the hot oven and bake for about 18 minutes. Start checking at 15 minutes if the fillet is thinner than 1 inch (2.5 cm) at its thickest point. Insert an instant-read food thermometer sideways into the thickest part of the flesh, avoiding the pan and checking more than one spot in an unusually uneven fillet. The USDA FSIS safe minimum internal temperature for fish is 145°F (63°C); bake until the thickest part reaches that temperature. If it has not reached 145°F (63°C), return it to the oven and check again after 2 minutes. A very thick side may need a few extra minutes, while a thin tail section can cook sooner.
- Rest briefly and serve. Take the salmon out when it reaches 145°F (63°C), then let it rest on the pan for 3 minutes. The fish will be quite hot, so use a wide spatula to separate the flesh from the skin and transfer it to a platter in large pieces. Finish with chopped parsley, extra dill, and lemon wedges. The stated cooking time includes an 18-minute bake and 3-minute rest; extra oven time needed to reach the safe temperature will extend the total.
Tips
Use thickness as your timing guide. A whole fillet is not uniformly thick: the center is usually deepest, and the tail is thinner. A side close to 1 inch (2.5 cm) thick often takes around 15 to 18 minutes at this temperature; a substantially thicker piece can take longer. These are estimates, not a substitute for checking the thickest part with a thermometer. If the tail begins to look done before the center, tuck a small piece of foil loosely over just the tail to slow its browning.
Choose a suitable fillet. Ask for a center-cut or fairly even side if you want the most consistent result, and have the fish counter remove pin bones if you prefer. A frozen fillet works too: thaw it overnight in the refrigerator, then pat it very dry before seasoning. Baking from frozen makes timing less predictable and can leave the outside overcooked before the center is ready, so thawing is the better choice for this method.
Adjust the herbs and citrus freely. If fresh dill is unavailable, use 2 teaspoons dried dill (about 1 g), or substitute 1 tablespoon chopped chives (3 g) for a milder onion-like note. Parsley can be left out or replaced with cilantro. A lime can stand in for the lemon, giving the fish a sharper, slightly different citrus flavor. Keep the salt and oil amounts similar so the fillet is seasoned evenly.
Protect the delicate surface. Avoid covering the whole fillet tightly with foil during baking; trapped steam can make the surface soft. Do not rely on color or flaking alone to establish safe doneness. The flesh can look opaque before the thickest point reaches the recommended temperature, so check with a thermometer and clean it after use.
Serving Suggestions
Serve the salmon warm on a platter, with the lemon wedges and herbs on the side. For a simple dinner, pair it with roasted potatoes, rice, or couscous and a green vegetable such as asparagus, green beans, or broccoli. A crisp salad with cucumber and a lightly acidic vinaigrette balances the richness of the fish; add bread if you want something to catch the lemony juices left on the platter.
For a larger meal, set out a sauce separately so guests can choose how much they want. Plain yogurt stirred with chopped dill, lemon juice, and a pinch of salt makes a cool, tangy accompaniment. A spoonful of grainy mustard mixed with a little olive oil and lemon is another easy option. If serving the salmon at room temperature as part of a buffet, keep it chilled until serving and do not leave it out for more than 2 hours.
Variations
Mustard and honey: Stir together 1 tablespoon Dijon mustard (15 g) and 2 teaspoons honey (14 g), then spread a thin layer over the oiled fish before adding the herbs. The glaze brings a gentle sweetness and browns faster, so begin checking the surface early while still verifying the center temperature.
Smoky paprika: Add ½ teaspoon smoked paprika (1 g) to the salt and pepper, and use parsley or chopped scallions instead of dill. This gives the fish a warm, smoky aroma without changing the oven temperature or basic method.
Ginger and soy: Replace the salt with 1 tablespoon reduced-sodium soy sauce (15 ml), and scatter 1 teaspoon finely grated fresh ginger (2 g) over the fish. Skip the lemon slices or use a little lime instead. Since soy sauce is salty, taste the cooked fish before adding any extra salt.
Butter and capers: Replace the olive oil with 2 tablespoons melted butter (28 g), and scatter 1 tablespoon drained capers (9 g) over the seasoned salmon. The result is richer and briny; use less added salt because capers contribute saltiness.
Storage and Reheating
Refrigerate cooked salmon within 2 hours of baking, sooner if the room is very warm. Remove any large lemon slices, divide the fish into meal-size portions, and place it in a shallow airtight container. Properly refrigerated cooked fish keeps for 3 to 4 days. If you will not eat it within that time, freeze it in a tightly sealed freezer-safe container for about 2 to 3 months for best quality. Thaw frozen portions in the refrigerator rather than on the counter.
Reheat only the portion you plan to eat. Place it in a covered oven-safe dish with a teaspoon of water or broth and warm at 275°F (135°C) until the center reaches 165°F (74°C), the USDA FSIS temperature for reheated leftovers. Check with a food thermometer; the time depends on the size and thickness of the portion, often about 10 to 15 minutes. A microwave also works: cover the fish and heat in short bursts, checking between bursts to avoid drying it out. Cold leftover salmon can instead be flaked into a salad or sandwich without reheating.
Frequently Asked Questions
How long does a whole salmon fillet take at 400°F?
A skin-on side around 2 pounds (900 g) and roughly 1 inch (2.5 cm) thick often takes about 15 to 18 minutes at 400°F (204°C), followed by a short rest. Thickness, starting temperature, and oven differences affect the timing. Check the thickest part with a food thermometer and cook fish to 145°F (63°C).
Should I bake salmon covered or uncovered?
Bake it uncovered for a lightly roasted surface and more predictable timing. A tightly covered pan traps steam and softens the top. If a thin tail section is browning or cooking too quickly, cover only that area loosely with foil rather than covering the entire fillet.
Do I need to flip the salmon halfway through?
No. Keep the fillet skin-side down for the full bake. The skin protects the underside from the hot pan and helps the salmon stay in one piece. Flipping a large, partly cooked side is awkward and can break the flesh; it is not needed for even cooking in a fully heated oven.
Can I bake a whole salmon fillet at 350°F instead?
Yes, but it will usually take longer, and the exact time still depends on thickness. Keep the same thermometer target of 145°F (63°C) in the thickest section rather than assuming a particular number of minutes guarantees doneness. If you choose 350°F (177°C), begin checking after about 20 minutes and continue in short intervals as needed.
How can I tell whether the salmon is done without cutting it open?
A thermometer is the most reliable way: insert it sideways into the thickest part and confirm it reads 145°F (63°C). The flesh should also look opaque and separate into flakes when gently pressed, but those visual cues are less precise. Avoid cutting deeply into the fillet just to inspect it, because that lets juices escape and still does not give a dependable temperature reading.
Can I prepare the salmon ahead of time?
You can remove pin bones and mix the seasonings ahead, but keep the raw fish refrigerated and add the salt shortly before baking for the best texture. If you season it in advance, cover it and refrigerate it; do not leave raw salmon at room temperature while the oven heats. Bake it close to serving time, since a freshly cooked whole side is easiest to portion and serve while warm.
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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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