How Long To Cook a Piece Of Salmon | Time & Temperature

For most fillets, cook for 4 to 6 minutes per half-inch of thickness, or until the internal temperature reaches 125°F to 140°F.

You can tell a lot about a cook from their approach to salmon. It’s one of those ingredients that separates a careful meal from a just-okay one. The line between translucent and chalky is remarkably thin, and for years the standard advice was a vague “until it flakes.” That works, but it misses the real trick.

The best answer for how to cook a piece of salmon isn’t just a single number — it’s a method that considers thickness, heat, and a target internal temperature. Whether you’re baking, pan-searing, or broiling, the goal is a tender, juicy piece of fish. Here’s what actually matters.

Setting Up the Cook

The thickness of your fillet determines everything. A thin, tail-end piece will cook in half the time a thick center-cut piece needs. The reliable benchmark is 4 to 6 minutes of cooking time per half-inch of thickness, measured at the thickest part of the fillet.

An instant-read thermometer is the only way to be absolutely sure. Pulling the salmon off the heat once the center hits 125°F gives you a medium-rare, buttery texture. Keeping it on to near 140°F produces a more well-done, flaky piece. Both are valid — just knowing which one you want is half the battle.

The Best Methods Compared

Different cooking methods require slightly different approaches, but they all benefit from the same foundational rule of thickness and temperature. Here’s how they stack up for a standard one-inch fillet.

• Baking (350°F to 450°F): Baking is the most hands-off method. At 400°F, individual 6-ounce portions take about 12 to 14 minutes. At 350°F, a larger piece can take closer to 25 minutes.
• Pan-Searing: High heat creates a crisp crust. Start skin-side down over medium-high heat for 6 to 7 minutes, then flip for 4 to 5 minutes more. Avoid moving the fillet while the skin is crisping.
• Broiling: Intense top-down heat works fast. Aim for an internal temperature of 125°F, which usually takes just 5 to 6 minutes under the broiler.
• Temperature Target: No matter the method, cooking to an internal temperature of 125°F to 140°F keeps the salmon from drying out. Preferred doneness is often closer to 125°F for a tender interior.

The variation in these methods is wide, but the principle is narrow. Once you know your target temperature, every method becomes just a tool to get you there reliably.

Why Thickness Overrides Everything

A one-inch thick fillet needs roughly twice the cook time of a half-inch fillet, yet most recipes default to a single time. This is why a thick center-cut piece often comes out raw in the middle if you follow a recipe meant for thinner tails.

Serious Eats deep-dives into this in their guide to pan-fried salmon. They emphasize that the internal temperature is far more reliable than any timer. Their outlined ideal salmon temperature sits between 125°F for medium-rare and 140°F for well-done. Here is a general breakdown of time by thickness for a 400°F oven:

These times are starting points, not rules. The only way to calibrate your exact cooking time is to measure the thickest part with a ruler and set a timer based on the half-inch guideline.

How To Tell It’s Done Without a Thermometer

Not everyone keeps a thermometer in the kitchen drawer. While it is the easiest tool, you can still judge doneness by sight and feel with a few reliable cues.

1. Check the color: Raw salmon is translucent and deep orange or red. Cooked salmon turns opaque and lighter in color. If the center still looks glassy, it’s underdone.
2. The flake test: Gently press on the thickest part with a fork. If the flesh separates into clean flakes with no resistance, it’s done. If it still holds together firmly, it needs more time.
3. Look for white albumin: That white protein that sometimes oozes out is albumin. A small amount means it is well-cooked; a large amount usually means it is slightly overcooked.
4. Feel for firmness: Raw salmon is soft and yields easily. Cooked salmon firms up and springs back slightly when pressed. The firmer it feels, the more well-done it is.

Visual cues are helpful guides, but they can be misleading with thicker fillets or different salmon species. For consistent results, leaning on a thermometer or the half-inch timing rule is more reliable.

Putting It All Together — A Quick-Reference Guide

The tension between a slow bake and a fast sear comes down to your schedule and texture preference. A gentle bake at 350°F creates a tender, evenly cooked piece of fish, while a high-heat sear gives you a golden, crackling crust with a buttery center.

One common mistake is overcooking the thin tail. For fillets with a tapered shape, fold the thin end under itself before cooking. This creates a more uniform thickness, allowing the whole piece to cook at the same rate.

For broiled salmon, the Foodandwine guide suggests cooking until the internal temperature reaches 125°F, then letting it broiled salmon time rest for 5 minutes. This carry-over cooking allows the center to finish without direct heat.

Whichever method you choose, the logic is the same. Cook until the internal temperature hits 125°F to 140°F, based on how done you like your salmon. The method just decides how fast that happens.

The Bottom Line

The question of how long to cook a piece of salmon only has one real answer: until it reaches 125°F to 140°F. Thickness, oven temperature, and cooking method simply determine how fast it gets there. The 4 to 6 minutes per half-inch rule is a solid mental shortcut that works across baking, pan-searing, and broiling.

For the best texture on your fillet, pull it off the heat just before it hits your target temperature — the residual heat will finish cooking it perfectly without drying it out.