Sous vide steak cooked in a water bath at 54-57°C for 1-2 hours reaches an internal temperature between rare and medium-rare; thicker cuts like chicken breast need 63-65°C for 1.5-2 hours.
How Is Sous Vide Different From Other Methods?
In conventional cooking, heat travels from the outside of the meat toward the centre, so the outer layers usually end up more cooked than the middle; in sous vide, meat sealed in a vacuum bag sits in water held at a constant temperature, so it reaches the same temperature all the way through and the risk of overcooking almost disappears.
Why Is the Time Given as Such a Wide Range?
In sous vide, temperature determines doneness while time mostly affects texture; a steak can reach the same temperature in 1 hour or 4 hours, but the longer it sits, the more tender it becomes. That is why the time is given as a range rather than one fixed number.
How Does Timing Change for Thicker Cuts?
A steak 2-3 cm thick heats through to the centre in 1-1.5 hours, while a piece 5 cm thick can need 2.5-3 hours to reach the same temperature; as thickness increases, the time for heat to reach the centre grows faster than in a straight line.
Why Does Pasteurisation Matter?
For meats like chicken, holding it for a long time below 63°C is not safe, since the pasteurisation time needed to eliminate bacterial risk stretches out enormously below that point. That is why the recommended 63-65°C range for chicken balances both texture and safety.
Why Sear It Afterwards?
Meat cooked sous vide comes out of the water bath pale, without any browning on the outside; that is why it gets seared in a very hot pan for 1-2 minutes per side right before serving. This brief sear barely changes the internal temperature — it just browns the surface.
Are Vegetables Cooked the Same Way?
Starchy vegetables like carrot or potato are cooked sous vide at a much higher temperature than meat, around 85-90°C, for 1-2 hours; at lower temperatures their cell walls do not soften enough and they stay firm.
Why Does It Need a Vacuum-Sealed Bag?
Vacuum sealing keeps the meat from touching the water directly and lets heat reach it evenly; a bag that is not fully sealed floats, leaving part of the meat closer to the surface where it can cook differently from the rest.
How Does the Temperature Change for Fish?
Fatty fish like salmon cook sous vide at a lower temperature, around 45-50°C, for 30-45 minutes; that temperature keeps the flesh intact and stops it from flaking apart too easily. White fish can go a touch higher, around 50-55°C, for a similar amount of time.
That small gap between the two ranges matters more than it looks, since fish flesh is delicate enough that even a few degrees can noticeably change the texture.