Cooking sealed in a bag in water held at exactly the temperature you want the food to end at, so it cannot overshoot.
Technique at a glance
A compact visual model of the lesson. Use the full mechanism and success criteria below when you practice.
Concept
Cooking sealed in a bag in water held at exactly the temperature you want the food to end at, so it cannot overshoot.
What changes
Every other cooking method applies heat far hotter than the target and relies on timing to stop at the right moment — which is why doneness is a race and why the outside of a roast is always more cooked than the middle.
What good looks like
The water is at temperature before the food goes in, and stays there — the whole method is the stability, not the number.
Practice counts when you cook
Reading this brief does not change your School state. Finish a real practice dish in Cook mode and log the cook; that cook is the evidence that advances the skill.
What to focus on
Mechanism
Every other cooking method applies heat far hotter than the target and relies on timing to stop at the right moment — which is why doneness is a race and why the outside of a roast is always more cooked than the middle. Sous-vide removes the race by making the environment the destination: water held at 54°C cannot take a steak past 54°C no matter how long it sits, so the whole piece arrives at one temperature edge to edge and stays there. Time then becomes a separate variable controlling texture rather than doneness — hours at 54°C still convert some collagen without ever overcooking the muscle. The unavoidable cost is that nothing browns at these temperatures, so a sous-vide piece is pale and grey until it is seared afterwards, and that sear must be fast and ferocious so it colours the surface without cooking inward.
Success criteria
The water is at temperature before the food goes in, and stays there — the whole method is the stability, not the number.
The bag is fully submerged with air displaced; a floating bag is insulated by its own air pocket and will not cook evenly.
The food comes out uniformly coloured through its whole thickness when cut, with no gradient.
It must be dried thoroughly before searing, or the sear will steam rather than brown.
Failure guards
Grey, unappetising meat.
Not seared afterwards, or seared too gently. Sous-vide does half the job; the crust is the other half.
The sear cooked a grey band into the outside.
The pan was not hot enough, so the sear took too long. It should be as hot as possible and as brief as possible.
Mushy texture on fish or lean meat.
Held far too long. Time is not neutral — enzymes keep working, and past a point the texture degrades even without overcooking.
Choose a practice dish
This lesson has no authored practice dish yet. Study the success criteria, then choose a recipe that uses the technique from the main skill page.