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Overview
Lean white fish cooks into soft, clean flakes. Lift it from the bag carefully and finish with herb butter, lemon, or a bright spoonful of seasoned oil.
Time and temperature
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| Texture | Bath setting | Check before serving | Cook time | Longest time |
|---|---|---|---|---|
| Delicate | 125°F | 145°F | 30 minutes | 60 minutes |
| Medium | 130°–132°F | 145°F | 35–40 minutes | 60 minutes |
| Firm | 135°F | 145°F | 45 minutes | 90 minutes |
Choose the time that matches the texture you want. Start timing when the bag goes into the fully heated water bath, and read the Cook safely section before serving.
Choose your texture
- 125°FDelicate
- Silky, delicate flakes that pair well with herb butter or bright citrus.
Best for
- Halibut
- Cod
- Sea bass
Notes
- Bag with olive oil, citrus, or butter to keep fish moist.
- Finish with a quick torch or broil for color.
Tips
- Vacuum gently or use a zipper bag to avoid crushing delicate fillets.
- Slide a slice of compound butter under the fish before sealing to baste during the cook.
- Torch at a distance or broil briefly to prevent overcooking while adding color.
- 130°–132°FMedium
- Moist, defined flakes that stay together under a fish spatula.
Best for
- Weeknight dinners
Notes
- Season with herbs/butter before bagging.
- Finish with lemon brown butter or herb oil.
Tips
- Lightly oil the fish before searing to avoid sticking since it's lean.
- If the fillets taper, fold the thin end under so everything cooks evenly.
- Discard the bag juices and build a quick pan sauce with clean butter, herbs, and stock.
- 135°FFirm
- Firm flakes for chowder, fish cakes, rice bowls, or a composed salad.
Best for
- Fish salads
Notes
- Flake after the thermometer reading and use immediately in chowders or fish cakes.
- Start pan sauces with clean stock, wine, and butter rather than bag juices.
Tips
- Let the fish rest briefly before flaking so it holds its shape, then serve right away.
- Reduce clean wine and stock with butter to create a sauce base for chowders or pan sauces.
- This option covers serving right away only and does not qualify freezing or storage.
Get it ready
- Choose fillets of similar thickness and pat them dry.
- Season lightly, saving lemon juice and vinegar for the finish.
- Lay the fish in one flat layer in each bag, then seal gently.
- Keep the bags fully submerged while the fish cooks.
Finish and serve
- Lift the fish carefully from the bag and pat the surface dry.
- Add herb butter, lemon, or seasoned oil, or give it a brief sear.
- Serve right away.
Useful tips
- Handle white fish gently at every stage. After sous vide, the flesh is delicate and will break apart if you grip it with tongs or flip it aggressively. Use a fish spatula (the thin, flexible kind) and slide it under the fillet rather than scooping. One confident motion is better than three careful ones.
- Seal on the gentle setting or use water displacement. A full seal on a delicate fillet will crush the flesh and force out moisture. You want just enough pressure to remove air, not enough to flatten the fish. If using a vacuum sealer, hit stop the moment you see the air leave.
- Skin-on fillets should always be seared skin-side down first, and that is usually the only side you sear. Press gently with a spatula for the first 30 seconds to prevent curling. 60–90 seconds total gives you glassy, chip-like skin while the flesh stays moist underneath.
- Anti-tip: do not marinate white fish in citrus or vinegar before sous vide. Acid denatures the proteins the same way heat does (that is how ceviche works). If you add lemon juice to the bag, you will get a mealy, ceviche-like texture on the surface instead of the clean, silky flake that makes sous vide fish special. Add acid after cooking, as a finishing sauce.
Questions
QDelicate: How do I prevent albumin from weeping?
Brine for 10 minutes in 3% salt water, pat dry, and avoid exceeding 125°F to keep proteins in check.
QDelicate: Can I cook multiple fillets together?
Yes — arrange in a single layer so water circulates evenly and all pieces hit 125°F simultaneously.
QDelicate: What’s the best way to plate delicate fish?
Use a fish spatula, support the underside with your hand, and transfer directly from the bag to a warm towel before saucing.
QMedium: Why cook white fish at 130°–132°F?
It gives a fully opaque, family-friendly texture while keeping moisture locked in.
QMedium: How do I keep it from breaking when searing?
Use high heat, minimal movement, and a thin fish spatula. Let the crust form before flipping.
QMedium: Can I meal prep this?
This guide is limited to serving right away after the thermometer reading and finish; it does not qualify storage, meal prep, leftovers, reheating, or holding.
QFirm: What fish benefit from the firm setting?
Cod, haddock, and pollock hold their shape well after the thermometer reading; the 135°F bath remains.
QFirm: Can I skip the sear?
Yes — after the thermometer reading, you can serve right away in a salad or soup without additional browning.
QFirm: How do I avoid overcooking when reheating?
This guide is limited to serving right away after the thermometer reading and finish; it does not qualify storage, meal prep, leftovers, reheating, or holding.
Cook safely
Before serving, check the thickest part of every piece of white fish with a food thermometer. It should hold at 145°F for at least 15 seconds. For a thin piece, slide the thermometer in from the side so the sensing part reaches the center.
If the food is too small to check, cook it until opaque and easy to separate with a fork. If you plan to serve it undercooked, or cool and reheat it later, use a method written for that purpose. Otherwise, serve it right away.