How Long to Bake Salmon at 400 for Perfect Results
Learn exactly how long to bake salmon at 400 for flaky, tender results every time. This 15-minute recipe features a lemon-dijon glaze and perfectly crispy edges.
If you are staring at a fresh fillet wondering how long to bake salmon at 400, the answer is simpler than you think. For a standard one-inch thick fillet, 12 to 15 minutes at this temperature is the sweet spot for achieving a moist interior with slightly caramelized edges.
Cooking baked salmon at 400 provides enough heat to render the fat quickly without drying out the delicate proteins. It is the gold standard temperature for home cooks who want dinner on the table fast without sacrificing texture.
This recipe uses a bright lemon and Dijon mustard glaze to complement the richness of the fish. When you roast salmon at 400 degrees, the sugars in the mustard caramelize beautifully, creating a savory crust that seals in all the natural juices.
Ingredients
The Fish
- 1.5 lbs (680g) center-cut salmon fillet, skin-on
- 1 tablespoon (15ml) extra virgin olive oil
- 1/2 teaspoon kosher salt
- 1/4 teaspoon cracked black pepper
Lemon Dijon Glaze
- 1 tablespoon (15g) Dijon mustard
- 1 tablespoon (15ml) honey or maple syrup
- 1 garlic clove, minced
- 1/2 teaspoon dried oregano
- 1/2 lemon, zested and juiced
Instructions
- 1
Preheat your oven to 400°F (200°C) and line a rimmed baking sheet with parchment paper or aluminum foil.
- 2
Pat the salmon fillet completely dry with paper towels; moisture is the enemy of a good sear.
- 3
Place the salmon skin-side down on the prepared baking sheet and rub the top with olive oil, salt, and pepper.
- 4
Whisk together the Dijon mustard, honey, garlic, oregano, lemon zest, and lemon juice in a small bowl.
- 5
Spread the glaze evenly over the top of the salmon using a spoon or pastry brush.
- 6
Bake the salmon for 12 to 15 minutes, depending on the thickness of the fillet, until the internal temperature reaches 135°F (57°C).
- 7
Remove from the oven and let the fish rest for 3 minutes; the residual heat will bring it to a perfect 145°F (63°C).
- 8
Serve immediately with extra lemon wedges on the side.
Nutrition (per serving)
Estimates only — not medical or dietary advice.
- Calories
- 315 kcal
- Protein
- 34 g
- Carbs
- 5 g
- Fat
- 17 g
- Fiber
- 0 g
- Sugar
- 4 g
- Sodium
- 385 mg
Tips
- → Always use a meat thermometer. Pulling the salmon at 135°F ensures it stays juicy after resting.
- → If your fillet is particularly thin (less than an inch), check it at the 10-minute mark to prevent overcooking.
- → For extra crispy edges, you can turn on the broiler for the final 60 seconds of cooking, but watch it closely.
- → Let the salmon sit at room temperature for 15 minutes before baking to ensure even cooking throughout the fillet.
FAQ
How do I know when salmon is finished baking?
The salmon is done when it flakes easily with a fork and the flesh has turned from translucent to opaque. Using a thermometer to hit 135°F-140°F is the most reliable method.
Should I bake salmon covered or uncovered at 400?
Bake it uncovered. At 400 degrees, you want the dry heat to roast the surface and caramelize the glaze. Covering it will steam the fish, resulting in a mushier texture.
Can I bake frozen salmon at 400 degrees?
It is best to thaw it first for even cooking. If baking from frozen, you will need to increase the time to 20-25 minutes, but the texture may not be as buttery.
Why does my salmon have white stuff on it after baking?
That white substance is albumin, a protein that pushes out when the fish is cooked. It's perfectly safe to eat, though it often indicates the fish was cooked a bit too fast or long.
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