How Long to Cook a Piece of Salmon in the Oven at 400°F

A 1-inch-thick piece of salmon takes about 12–14 minutes in a 400°F (200°C) oven, though thickness and starting temperature affect the timing. This simple baked salmon is seasoned with lemon, garlic, and dill; check the thickest part with a food thermometer rather than relying on time alone.

Ingredients

4 skin-on or skinless salmon fillets, about 6 oz (170 g) each and 1 inch (2.5 cm) thick, pin bones removed
1 tablespoon (15 ml) olive oil
¾ teaspoon (4.5 g) fine salt
¼ teaspoon (0.5 g) freshly ground black pepper
½ teaspoon (1.5 g) garlic powder
1 teaspoon (1 g) finely chopped fresh dill, plus a little more to serve
½ lemon, cut into 4 wedges, plus 1 teaspoon (5 ml) juice if desired

Instructions

Heat the oven and prepare the pan. Place a rack in the middle of the oven and heat it to 400°F (200°C). Line a rimmed baking sheet with parchment paper or foil for easier cleanup. If using foil, lightly oil it so the salmon is less likely to stick. Let the oven finish preheating before baking; a properly heated oven makes the timing more predictable.
Prepare the salmon. Pat the fillets dry with paper towels, including the skin if present. Drying the surface helps the seasoning adhere and reduces excess moisture on the pan. Run your fingertips over the flesh to check for pin bones, then pull out any you find with clean tweezers. Arrange the pieces on the prepared sheet with a little space between them so hot air can circulate.
Season. Brush the tops and sides with the olive oil. Sprinkle evenly with salt, pepper, and garlic powder, then add the chopped dill. If your fillets have skin, place them skin-side down; there is no need to flip them during baking. Add lemon wedges to the pan if you like their flavor warmed, or keep them aside to squeeze over the fish after it cooks.
Bake and check the temperature. Bake for 12–14 minutes for fillets that are about 1 inch (2.5 cm) thick. Begin checking at 12 minutes, especially if the pieces are narrow or your oven runs hot. Insert an instant-read food thermometer sideways into the thickest part of a fillet without touching the pan. For food safety, USDA FSIS recommends that fish reach a safe minimum internal temperature of 145°F (63°C), checked with a food thermometer. If it has not reached that temperature, return it to the oven and check again after 1–2 minutes.
Rest and serve. Take the salmon out when it reaches 145°F (63°C), then let it rest on the pan for 3 minutes. The flesh should separate into moist flakes when gently pressed with a fork. Finish with lemon juice and extra dill, if desired, and serve while warm. The exact doneness time varies because fillets are not always evenly thick, so use the thermometer reading as the deciding check.

Tips

Use thickness as your timing guide. The estimate of 12–14 minutes is for a piece about 1 inch thick at its thickest point. A thinner piece may be ready sooner; a piece closer to 1½ inches (4 cm) can need several extra minutes. Measure the thickest area, not the narrow tail, and start checking early.
Choose fresh or thawed fish. If using frozen salmon, thaw it in the refrigerator before cooking and pat it dry. Baking from frozen is possible, but it changes the cooking time and can make the outside overcook before the center is done. Avoid leaving raw fish at room temperature while the oven heats.
Adjust the seasoning to what you have. Dried dill can stand in for fresh dill; use about ⅓ teaspoon (0.3 g) dried in place of 1 teaspoon fresh. If you do not have garlic powder, omit it or use 1 small grated garlic clove (about 3 g), spreading it thinly so it does not burn. Olive oil can be replaced with another neutral cooking oil.
Do not judge doneness by color alone. Salmon can look opaque before it has reached the recommended temperature, and a thick piece may still be cool in the middle. Check the thickest part with a thermometer, and avoid repeatedly opening the oven door because that lets heat escape.

Serving Suggestions

Serve the hot salmon with the lemon wedges from the pan and a simple side that can be prepared while it bakes. Roasted potatoes, rice, couscous, or warm farro make the meal more filling; green beans, asparagus, broccoli, or a crisp salad add a fresh contrast. Spoon any flavorful oil and juices left on the baking sheet over the fish or vegetables, taking care around the hot pan.

For an easy plate, serve one fillet with rice and a green vegetable, then add a spoonful of plain yogurt mixed with lemon and chopped dill. For a lighter meal, break the cooked fish into large flakes over salad greens with cucumber and a mustard vinaigrette. If serving the salmon with a salty sauce or seasoned side, taste before adding extra salt at the table.

Variations

Lemon-herb: Replace the dill with 1 teaspoon (1 g) chopped parsley or chives, or combine a small amount of each. Add finely grated lemon zest before baking and squeeze the lemon over the salmon after it comes out of the oven. Fresh herbs brighten the finish; dried herbs have a more concentrated flavor, so use less.

Maple-mustard glaze: Stir together 1 tablespoon (15 ml) maple syrup and 1 tablespoon (15 g) Dijon mustard. Brush a thin layer over the salmon before baking, then check the temperature as directed. The glaze adds sweetness and a tangy note, and it can brown more quickly than plain oil, so begin checking at the early end of the time range.

Simple paprika seasoning: Use ½ teaspoon (1 g) sweet paprika in place of the dill and garlic powder. It gives the fish a warm, gently smoky flavor without changing the cooking method. Smoked paprika is also suitable, but its flavor is stronger; start with ¼ teaspoon (0.5 g) if you want it subtle.

Cook a larger side of salmon: A whole side is thicker and less uniform than individual portions, so do not apply the fillet timing by simply multiplying it. Use the same oven temperature, arrange the fish on a large rimmed pan, and check the thickest section with a thermometer. The center may need substantially longer than the thin edges; if those edges are done first, you can loosely shield them with foil while the thicker portion finishes.

Storage and Reheating

Refrigerate leftover salmon within 2 hours of cooking, storing it in a shallow airtight container. Cooked fish keeps for 3–4 days in the refrigerator. If you will not use it within that time, freeze it in a well-sealed freezer-safe container; for best texture, use it within about 2–3 months. Thaw frozen leftovers in the refrigerator rather than on the counter.

Reheat only the portion you plan to eat. Put the salmon in an oven-safe dish, add a teaspoon of water or broth to help limit drying, and cover loosely with foil. Warm it in a 275°F (135°C) oven until heated through; leftovers should reach 165°F (74°C), checked with a food thermometer. The time depends on the size and thickness of the piece, so check the center rather than setting a fixed timer. You can also eat refrigerated cooked salmon cold in a salad, provided it was handled and stored safely.

Frequently Asked Questions

How long does a 1-inch piece of salmon take at 400°F?

Plan on about 12–14 minutes for a 1-inch-thick piece in a fully preheated 400°F (200°C) oven. Start checking at 12 minutes, since the shape of the fillet, its starting temperature, and differences between ovens can shift the timing. Use 145°F (63°C) in the thickest part as the food-safety endpoint.

Should I bake salmon covered or uncovered?

Bake it uncovered for this recipe. The exposed surface cooks evenly without trapping steam, and the seasoning stays on the fish. Covering salmon can be useful if a glaze is browning too quickly or if you are reheating leftovers, but it is not necessary for ordinary fillets.

Do I need to flip salmon in the oven?

No. Place it skin-side down if the skin is attached and leave it in place while it bakes. The oven cooks the top and bottom without turning, and keeping the fish skin-side down makes it easier to lift off the pan after cooking. If the skin sticks, slide a thin spatula between the flesh and skin when serving.

Can I cook salmon straight from frozen?

Yes, but the timing in this recipe is for thawed fillets. For more even results, thaw salmon overnight in the refrigerator, then pat it dry before seasoning. If cooking from frozen, follow a reliable method designed for frozen fish and check the center with a thermometer; do not assume the usual 12–14 minutes will be enough.

How can I tell if salmon is done without a thermometer?

A fork can show whether the flesh flakes, and the center should look opaque rather than raw and translucent. Those signs are less dependable than a thermometer, particularly for a thick fillet. For a clear food-safety check, insert an instant-read thermometer into the thickest section and cook the fish to 145°F (63°C).

Does salmon need to rest after baking?

A short 3-minute rest makes it easier to handle and serve, and gives the juices a moment to settle. It is not a substitute for reaching the recommended safe temperature: check the fish before taking it out of the oven, then let it rest. Serve soon afterward for the best texture.

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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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