Salmon at 400 is one of the most popular fish options for home cooking due to its rich flavor, nutritional value, and versatility. Whether you’re a seasoned chef or a beginner in the kitchen, baking salmon at the right temperature is essential for achieving a tender, flavorful result. One of the most commonly asked questions when preparing salmon is: How long does it take to bake salmon at 400?

This comprehensive guide will explore everything you need to know about baking salmon at 400°F, including the optimal cooking time, the factors that affect it, and tips for ensuring your salmon is cooked to perfection. Let’s dive in and learn how to bake salmon to suit your preferences.
Why Bake Salmon at 400°F?
Baking salmon at 400°F is considered one of the best methods to cook this delicate fish. This moderate to high temperature allows the salmon to cook quickly while retaining its moisture. The heat helps to form a golden, slightly crispy exterior while preserving the natural tenderness and flaky texture of the fish. Additionally, cooking at 400°F offers a good balance, ensuring that the salmon is cooked through without drying out.
Salmon is a fatty fish, and the fat content helps maintain its juiciness during cooking. Baking it at the right temperature enhances the flavor, allowing the rich, buttery taste to shine through without overpowering the natural flavors of the fish. Moreover, 400°F is a temperature that’s relatively easy to control in most standard home ovens, making it an ideal choice for everyday cooking.
Factors That Affect the Baking Time
Several factors can influence how long it takes to bake salmon at 400°F. Let’s explore the most important ones:
Thickness of the Salmon
The thickness of the salmon fillet or steak is one of the most important factors when determining baking time. A thicker piece of salmon will require more time to cook through than a thinner one. On average, salmon fillets that are about 1 inch thick will bake for around 12-15 minutes, while thicker cuts (around 1.5 to 2 inches) may need 15-20 minutes.

Type of Salmon
There are different types of salmon, such as Atlantic salmon, sockeye salmon, king salmon, and coho salmon. The type of salmon you’re baking can slightly affect the cooking time due to differences in texture and fat content. For instance, king salmon, being fattier, may require slightly more time to bake compared to leaner varieties like sockeye salmon.
Whether the Salmon is Fresh or Frozen
Frozen salmon takes longer to bake than fresh salmon because it needs time to thaw in the oven before it can cook properly. If you’re baking frozen salmon, it’s essential to increase the cooking time by about 5-7 minutes and to check the doneness with a thermometer to avoid undercooking or overcooking.
Desired Doneness
Salmon can be cooked to different levels of doneness, from rare to well-done. If you prefer your salmon to remain pink and moist in the center, aim for a cooking time of about 12 minutes for a 1-inch thick fillet. For a more well-done result, you may need to bake it for 15-20 minutes, depending on thickness.
How Long to Bake Salmon at 400°F
General Guidelines for Baking Salmon at 400°F
- 1-inch thick fillets or steaks: Bake for 12-15 minutes at 400°F.
- 1.5 to 2-inch thick fillets or steaks: Bake for 15-20 minutes at 400°F.
- Frozen salmon: Bake for 20-25 minutes, depending on the thickness of the fillet.
These times are based on the assumption that you’re baking salmon on a baking sheet or in a shallow pan without covering it. If you use foil or parchment paper to cover the salmon, the baking time may be slightly reduced.
Temperature Guidelines for Salmon Doneness
Salmon should be cooked to an internal temperature of 145°F (63°C) according to the USDA, which ensures that the fish is fully cooked but still moist and tender. However, many chefs recommend cooking salmon to an internal temperature of 120-125°F for a more medium-rare texture, leaving the fish slightly pink in the center. The fish will continue to cook slightly after removing it from the oven, so be mindful of this when checking the temperature.
How to Bake Salmon at 400°F: A Step-by-Step Guide
Now that we’ve covered the basics, let’s go over the steps to bake salmon at 400°F and achieve a delicious result.
Preparing the Salmon
Start by preparing your salmon fillets or steaks. If you’re using frozen salmon, make sure to thaw it completely before baking. You can thaw salmon in the refrigerator overnight or use the defrost function on your microwave for quicker results.
Once the salmon is ready, pat it dry with paper towels. This helps to remove any excess moisture and ensures a better texture when baking.
Seasoning and Marinating
Salmon has a naturally rich flavor, so it doesn’t require an extensive marinade. However, seasoning is essential for enhancing its taste. For a simple and delicious seasoning, rub the salmon with olive oil, salt, pepper, and any other herbs or spices you enjoy. Dill, garlic, lemon zest, paprika, and thyme all pair wonderfully with salmon.

If you have time, marinating the salmon for 15-30 minutes can add extra flavor. You can use a mixture of olive oil, lemon juice, garlic, soy sauce, and mustard for a tangy, savory marinade.
Baking the Salmon
Preheat your oven to 400°F (200°C). Place the seasoned salmon fillets or steaks on a baking sheet lined with parchment paper or lightly greased to prevent sticking. If you’re using a whole salmon, you can bake it directly on a roasting pan or a baking sheet.
Bake the salmon for the recommended time based on its thickness. For fillets around 1 inch thick, check the salmon at the 12-minute mark. If the flesh has turned opaque and flakes easily when gently pressed with a fork, the salmon is done.
Checking for Doneness
The best way to check the doneness of your salmon is to use a meat thermometer. Insert it into the thickest part of the fillet or steak. If it reads 145°F, the salmon is perfectly cooked. If you prefer a slightly less cooked result, aim for 120-125°F for a medium-rare texture.
Alternatively, you can test doneness by gently flaking the salmon with a fork. If it flakes easily and the flesh is opaque, it’s done.
Tips for Perfectly Baked Salmon
Achieving the perfect baked salmon comes down to a few key tips:
Achieving the Right Texture
- Do not overcook the salmon: Overcooked salmon becomes dry and tough. It’s best to pull the fish out of the oven when it’s still slightly underdone and let it rest for a few minutes.
- Use parchment paper or foil: This helps retain moisture, ensuring the salmon remains juicy and tender.
- Avoid overcrowding the pan: If baking multiple fillets, ensure they are spaced out on the baking sheet to allow proper heat circulation.
The Best Side Dishes to Serve with Baked Salmon
Salmon pairs beautifully with a variety of side dishes. Here are some popular options:
- Roasted vegetables: Asparagus, Brussels sprouts, or carrots are excellent choices.
- Rice or quinoa: These grains provide a nice balance to the richness of the salmon.
- Salads: A light, fresh salad with a lemon vinaigrette complements the flavor of the fish.
Frequently Asked Questions (FAQ)
Can you bake salmon at 400°F if it’s frozen?
Yes, you can bake frozen salmon at 400°F. Just be sure to extend the cooking time by 5-7 minutes.
How do you keep salmon from drying out in the oven?
To keep salmon from drying out, don’t overcook it. You can also cover the fish with foil while baking to trap moisture and use a marinade or seasoning to help retain flavor.
Should you cover salmon with foil when baking?
Covering salmon with foil can help keep it moist, but it’s not necessary. For a crispy exterior, bake it uncovered.

Conclusion
Baking salmon at 400°F is a simple yet effective way to cook this delicious and nutritious fish. By understanding the factors that influence cooking time, such as thickness, type, and desired doneness, you can ensure perfectly baked salmon every time. Whether you’re preparing a quick weeknight dinner or a special meal for guests, knowing how long to bake salmon at 400°F will help you achieve a tender, flavorful result.