Bake cod at 350°F for 18 to 25 minutes, depending on thickness. It’s done when the thickest part reaches 145°F and the flesh is opaque and flakes easily with a fork. Thinner fillets may finish closer to 15 minutes.
How Long to Bake Cod at 350: 20 minutes for a 1-inch fillet. Start thin cuts at 15 minutes and thick cuts at 25 minutes. The fish is safe at 145°F (63°C) and should look opaque and part into flakes with a fork.
For the best result, bake in a dish, skin side down if skin is on, with oil or butter, salt, and lemon. Check early, as cod dries fast. If the center is still shiny or tight, bake 2 to 3 minutes more, then test again.
The Short Answer, With Numbers
Bake cod at 350°F until the center reaches 145°F and the flesh is opaque and flakes easily. For most fillets, that is about 12 to 20 minutes, depending mainly on thickness.
| Cod situation | Safe minimum internal temperature | Doneness check |
|---|---|---|
| Fresh or thawed cod fillet | 145°F (63°C) | Flesh opaque, separates easily with a fork |
| Fresh or thawed cod loin | 145°F (63°C) | Flesh opaque, separates easily with a fork |
| Leftover cooked cod, reheated | 165°F (74°C) | Steaming hot throughout |
350°F baking times by thickness
Use thickness, not weight, as your first guide. A long, thin 8-ounce fillet cooks faster than a short, thick 8-ounce loin because heat has less distance to travel.
- ½-inch cod fillet: start checking at 10 minutes; usually done around 10 to 12 minutes.
- ¾-inch cod fillet: start checking at 12 minutes; usually done around 12 to 15 minutes.
- 1-inch cod fillet or loin: start checking at 15 minutes; usually done around 15 to 18 minutes.
- 1¼-inch thick cod loin: start checking at 18 minutes; usually done around 18 to 22 minutes.
Example: a 1-inch thick cod loin baked at 350°F should be checked at 15 minutes. If the center reads 138°F and still looks translucent, return it to the oven for 3 minutes, then check again.
Example: two ¾-inch fillets on a sheet pan may be ready at 13 minutes. Four crowded fillets in a small dish may need closer to 16 minutes because steam and crowding slow browning and heat flow.
If the cod is covered with foil, expect the timing to run toward the high end. Covered cod steams more than it roasts, so a 1-inch piece may need about 18 minutes instead of 15.
If the cod has a thick sauce, crumb topping, or butter layer, check the fish itself, not the topping. Insert the thermometer into the thickest part of the cod, away from the pan.
For frozen cod baked at 350°F, plan on a longer bake than thawed cod. Start checking a 1-inch frozen piece around 25 minutes, but rely on 145°F and opaque, flaking flesh rather than the clock.
Thin tail pieces are an edge case. A tapered end may hit 145°F several minutes before the thick center. Fold the thin end under before baking, or remove thinner pieces earlier.
Leftover cooked cod is different. If reheating it in a 350°F oven, heat it until it reaches 165°F and is steaming hot throughout, not merely warm at the edges.
Cod Baking Time at 350
Bake cod at 350°F for 12 to 25 minutes, depending mainly on thickness and whether the fish is fresh, thawed, or frozen.
The doneness target is 145°F at the thickest point. The flesh should look opaque and separate easily with a fork.
| Cod thickness or form | 350°F bake time | What to check |
|---|---|---|
| Thin fillet, 1/2 inch | 12 to 15 minutes | Opaque through center |
| Standard fillet, 3/4 inch | 15 to 18 minutes | Flakes at thickest part |
| Thick fillet, 1 inch | 18 to 22 minutes | 145°F in center |
| Very thick loin, 1 1/4 inches | 22 to 25 minutes | Center no longer translucent |
| Frozen cod fillet | 25 to 35 minutes | 145°F in thickest point |
Best Time by Thickness
For a typical grocery-store cod fillet about 3/4 inch thick, plan on 16 to 18 minutes at 350°F.
A thinner tail piece may finish in 12 minutes. A thick center-cut loin can need 22 minutes or more.
Start checking early. Cod goes from moist to dry quickly once it passes the point where the flakes separate cleanly.
Use a thermometer in the thickest area, not the edge. The edge can look done while the center is still slightly translucent.
Worked Examples
Example 1: two thawed cod fillets, each 6 ounces and about 3/4 inch thick. Bake at 350°F for 16 minutes, then check for 145°F.
Example 2: one thick 8-ounce cod loin, 1 inch thick. Bake at 350°F for 20 minutes, then check the center.
Example 3: four thin tail pieces, 1/2 inch thick. Bake at 350°F for 12 minutes. If the center still looks glossy, add 2 minutes.
Example 4: frozen cod, baked without thawing. Bake at 350°F for 25 minutes, then check. Add 3 to 5 minutes if the center is not 145°F.
Covered vs. Uncovered
Bake cod uncovered for a firmer surface and light browning. Use the lower end of the time range for thin fillets.
Bake cod covered with foil if using sauce, lemon slices, or butter. Covered cod often needs 2 to 4 extra minutes because steam slows surface drying.
If the pan has lots of liquid, expect the cod to cook more like it is poaching. A 1-inch fillet may take 22 to 25 minutes instead of 18 to 20.
Pan and Portion Edge Cases
A glass or ceramic baking dish can run slightly slower than a dark metal sheet pan. Add 2 minutes before rechecking if the center is not done.
If fillets overlap, the covered area cooks slowly. Arrange cod in a single layer with space between pieces whenever possible.
Small 4-ounce portions may finish 2 to 3 minutes sooner than large 8-ounce pieces of the same thickness.
If one end is thin and the other is thick, fold the thin end under. This evens the thickness and helps prevent dry edges.
For the cleanest result, remove cod as soon as it reaches 145°F and flakes easily. Letting it sit in a hot pan keeps cooking the fish.
Thickness and Fillet Size
At 350°F, cod baking time is driven more by thickness than by total weight. A thin 4-ounce tail piece may finish in 10 minutes, while a thick 8-ounce center-cut fillet can need 18 to 22 minutes.
Measure the fillet at its thickest point before baking. Use a ruler, not a guess. Cod that is 1 inch thick is the baseline: expect about 12 to 15 minutes at 350°F in a preheated oven.
| Cod thickness | Typical fillet size | Approximate bake time at 350°F |
|---|---|---|
| 1/2 inch | Thin tail piece, 3 to 5 oz | 8 to 10 minutes |
| 3/4 inch | Small fillet, 4 to 6 oz | 10 to 12 minutes |
| 1 inch | Standard fillet, 5 to 7 oz | 12 to 15 minutes |
| 1 1/4 inches | Thick center cut, 6 to 8 oz | 15 to 18 minutes |
| 1 1/2 inches | Very thick loin, 8 to 10 oz | 18 to 22 minutes |
The safe minimum internal temperature for cod is 145°F. The flesh should be opaque and separate easily with a fork. Check the center of the thickest piece, not the edge.
How fillet size changes the timing
A 6-ounce cod fillet that is long and flat cooks faster than a 6-ounce fillet shaped like a thick block. Weight matters less than height because heat must travel to the center.
Example: a 6-ounce fillet that is 3/4 inch thick may be done in 11 minutes. A 6-ounce center-cut piece that is 1 1/4 inches thick may need 16 or 17 minutes.
If one end is 1/2 inch and the other end is 1 inch, judge by the 1-inch section. Start checking at 12 minutes. The thin end may flake first, but the thick end must reach 145°F.
For a tray with mixed sizes, remove thinner pieces early. A 4-ounce tail piece may be ready at 9 minutes, while an 8-ounce loin beside it may still need another 8 to 10 minutes.
Worked timing examples
Two 5-ounce fillets, each 1 inch thick, should take about 12 to 15 minutes at 350°F. Check at 12 minutes, then add 2-minute intervals until the center reaches 145°F.
One 10-ounce cod loin, 1 1/2 inches thick, usually takes 18 to 22 minutes. Check at 18 minutes. If the center is still translucent or below 145°F, return it to the oven briefly.
Four thin 3-ounce tail pieces, about 1/2 inch thick, may finish in 8 to 10 minutes. Because thin cod overcooks quickly, start checking at 8 minutes, not 12.
A stuffed, folded, or rolled cod piece behaves like a thicker fillet. If folding makes the center 1 1/2 inches thick, use the 18 to 22 minute range and verify 145°F in the middle.
If cod is baked under a heavy sauce, crumbs, or vegetables, expect the upper end of the range. A 1-inch sauced fillet may need 15 minutes instead of 12 because the topping slows heat transfer.
Spacing also matters. Leave at least 1 inch between fillets on the pan. Crowded cod steams and cooks unevenly, so the center pieces may take several minutes longer than edge pieces.
How to Bake Cod
Bake cod at 350°F for 18 to 25 minutes, depending on thickness. The target is 145°F in the thickest part, with flesh that turns opaque and flakes easily with a fork.
Use thickness, not fillet count, to set the timer. A thin 1/2-inch tail piece cooks much faster than a 1 1/4-inch center-cut loin, even if both weigh 6 ounces.
Step-by-step method for 350°F cod
- 1. Preheat the oven to 350°F. Let it fully preheat before the fish goes in. Cod cooks quickly, so starting in a cool oven can make the timing unreliable.
- 2. Prepare the baking dish. Use a shallow dish just large enough to hold the fillets in one layer. Lightly oil the dish or line it with parchment to reduce sticking.
- 3. Dry and season the cod. Pat the fish dry. For each 6-ounce fillet, use about 1 teaspoon olive oil or melted butter, 1/8 teaspoon salt, and a pinch of pepper.
- 4. Add moisture if desired. For a softer, less browned result, add 1 tablespoon lemon juice, white wine, or broth per fillet to the dish. Do not submerge the fish.
- 5. Bake by thickness. Bake 1/2-inch cod for 12 to 16 minutes, 3/4-inch cod for 16 to 20 minutes, and 1-inch cod for 20 to 25 minutes.
- 6. Check the center. Insert an instant-read thermometer into the thickest part. Cod is done at 145°F. The flesh should be opaque and separate easily with a fork.
- 7. Rest briefly before serving. Let the cod sit for 2 to 3 minutes in the dish. Spoon pan juices over the top so the surface does not dry out.
Timing examples
| Cod piece | Best 350°F bake time | What to check |
|---|---|---|
| 4-ounce thin tail, about 1/2 inch thick | 12 to 15 minutes | Edges flake first; check early |
| 6-ounce fillet, about 3/4 inch thick | 16 to 20 minutes | Center turns opaque |
| 8-ounce loin, about 1 inch thick | 20 to 25 minutes | Thermometer reaches 145°F |
| Two 6-ounce fillets in one dish | 16 to 22 minutes | Leave space between pieces |
Example: if you have a 7-ounce cod loin that is 1 inch thick at the center, start checking at 20 minutes. If the center is still translucent, bake 2 more minutes and check again.
For uneven fillets, tuck the thin tail under itself. This doubles the thin end and helps it finish closer to the thick center instead of drying out first.
Frozen cod can bake unevenly if put straight into the oven. For best texture, thaw first, pat very dry, then use the same 350°F timing by thickness.
If baking cod with a breadcrumb topping, expect the upper end of the range. A 3/4-inch fillet that normally takes 18 minutes may need about 20 minutes because the topping slows heat slightly.
If the cod releases white protein on the surface, it is not unsafe by itself. It usually means the fish is getting hot fast or is close to done, so check the internal temperature immediately.
Reheated cooked cod or other leftover cooked seafood should reach 165°F and be steaming hot throughout.
How to Tell It’s Done
Cod is done when the thickest part reaches 145°F (63°C) and the flesh has turned opaque and flakes apart easily with a fork.
At 350°F, timing is only a guide. The reliable check is internal temperature plus texture. Start checking thin fillets early so they do not dry out while waiting for a clock.
Use the Thickest Point, Not the Edge
Insert an instant-read thermometer into the center of the thickest section. Keep the probe in the fish, not touching the pan, foil, or a bone.
For a 1-inch cod fillet, begin checking at about 12 minutes. If it reads 135°F, return it to the oven and check again in 2-minute intervals.
For a 1 1/2-inch thick loin, start checking around 16 minutes. A thick center can lag behind the outer flakes by several minutes.
For uneven pieces, check the thickest piece first. If it reaches 145°F, thinner pieces are usually done or slightly past done.
| Cod piece | When to start checking at 350°F | Done sign |
|---|---|---|
| Thin tail piece, about 1/2 inch | 8 minutes | Opaque, flakes easily |
| Standard fillet, about 1 inch | 12 minutes | 145°F in center |
| Thick loin, about 1 1/2 inches | 16 minutes | 145°F in thickest part |
| Stuffed or heavily topped cod | Check center of fish, not topping | 145°F in fish |
Fork Test: What “Flakes Easily” Means
Press a fork into the thickest part and twist gently. Done cod separates into large, moist flakes with little resistance.
If the center still looks translucent or shiny, it needs more time. If it breaks into dry, tight shreds, it has gone past ideal doneness.
Opaque means the flesh is no longer glassy. Properly baked cod changes from translucent white to solid white throughout the center.
Worked Examples
Example 1: A 6-ounce, 1-inch cod fillet bakes at 350°F for 12 minutes and reads 140°F. Bake 2 more minutes, then recheck. Remove when it reaches 145°F.
Example 2: Two fillets share one pan. One is 3/4 inch thick and one is 1 1/2 inches. Remove the thin piece when done, then keep baking the thick piece.
Example 3: Cod baked under lemon slices or a crumb topping may brown before the fish is done. Ignore the surface color and check the center temperature.
Edge Cases
If cod is folded under itself, the double-thick area cooks slower. Unfold it before baking or treat that spot as the thickest point.
If the fillet is very wet or baked in a saucy dish, the exterior may look done before the center is hot enough. Use the thermometer, not appearance alone.
If reheating cooked cod, the target is different: leftover cooked seafood should be reheated to 165°F (74°C) and be steaming hot throughout.
Time Chart for Cod
Bake cod at 350°F until the center reaches 145°F and the flesh is opaque and flakes easily with a fork. For most fillets, that means 12 to 22 minutes, depending mainly on thickness.
| Cod piece | Thickness | 350°F bake time | Best check |
|---|---|---|---|
| Thin fillet | 1/2 inch | 10 to 12 minutes | Check at 9 minutes |
| Standard fillet | 3/4 inch | 12 to 15 minutes | Check at 12 minutes |
| Thick fillet | 1 inch | 15 to 18 minutes | Check at 15 minutes |
| Extra-thick loin | 1 1/4 inches | 18 to 22 minutes | Check at 18 minutes |
| Frozen cod fillet | 3/4 to 1 inch | 22 to 28 minutes | Check center temperature |
| Cod in foil packet | 3/4 to 1 inch | 16 to 22 minutes | Open packet and test center |
Rule of Thumb by Thickness
At 350°F, use about 10 minutes per inch as a starting point, then add time for cold fish, sauce, vegetables, foil, or a crowded pan.
A 1/2-inch tail piece may be done in 10 minutes. A 1-inch center-cut fillet usually needs about 16 minutes. A 1 1/4-inch loin often needs close to 20 minutes.
The only final doneness target is 145°F in the thickest part. The fish should look opaque, not translucent, and separate easily when pressed with a fork.
Worked Examples
Example 1: Two 6-ounce cod fillets, each 3/4 inch thick, on a sheet pan. Start checking at 12 minutes. Expect 13 to 15 minutes total.
Example 2: One thick 8-ounce cod loin, about 1 1/4 inches thick. Start checking at 18 minutes. Expect 20 to 22 minutes if the fish went into the oven cold.
Example 3: Four frozen cod fillets, each about 1 inch thick. Bake 22 minutes, then check the thickest center. Expect 24 to 28 minutes total.
Example 4: Cod baked under lemon butter and breadcrumbs. The topping slows heat transfer slightly. Add 2 to 4 minutes compared with plain fillets of the same thickness.
Pan and Cover Adjustments
Use the shorter time range for cod on a preheated metal sheet pan. Use the longer range for glass or ceramic dishes, especially if the dish is full.
Foil packets trap steam, so the surface stays moist, but the center can still lag. For a 1-inch fillet in foil, plan on 18 to 22 minutes, then verify 145°F.
If the cod is packed tightly with vegetables, add 3 to 6 minutes. Spread pieces in a single layer when possible so the thickest fillet does not undercook.
Edge Cases
Very thin tail pieces cook fast. If one end is under 1/2 inch thick, tuck it under itself or remove that piece early once it flakes and reaches 145°F.
Uneven fillets need a thermometer in the thickest part, not the thin edge. A thin edge may flake at 10 minutes while the center still needs several more minutes.
If the cod is opaque at the edges but glossy in the center, give it 2 more minutes and check again. Avoid jumping by 5 minutes, because cod dries quickly once past done.
For reheated leftover cooked cod, heat to 165°F until steaming hot throughout. This is a reheating target, not the target for freshly baked cod.
Frequently Asked Questions
How long do you bake cod at 350°F?
Bake cod at 350°F for about 18 to 25 minutes, depending on thickness. A 1-inch fillet usually takes around 20 minutes. The cod is done when it reaches 145°F internally and the flesh is opaque and separates easily with a fork.
How long to bake frozen cod at 350°F?
Bake frozen cod at 350°F for about 30 to 35 minutes. Thicker pieces may need a few extra minutes. Check the center with a food thermometer; cod is safe at 145°F and should be opaque, moist, and flake easily with a fork.
Should I cover cod when baking at 350°F?
Cover cod with foil if you want a softer, moister texture, especially for thin fillets. Bake covered for about 15 minutes, then uncover for the last 5 to 8 minutes. Either way, cook it to 145°F and check that it flakes easily.
How long to bake cod at 350°F in foil?
Cod baked in foil at 350°F usually takes 20 to 25 minutes. Foil traps steam, so the fish stays moist and cooks gently. Open the packet carefully, then confirm the thickest part reaches 145°F and the flesh is opaque and flakes easily.
How do I know when baked cod is done?
Cod is done when the thickest part reaches 145°F. Visually, the flesh should turn opaque instead of translucent and separate easily with a fork. If the center still looks glossy or resists flaking, bake it a few minutes longer and recheck.
