In sous-vide cooking the food – a beef entrecôte, chicken, fish or vegetables – is placed in a plastic pouch with seasoning or a little oil and vacuum-sealed. The pouch then goes into a water bath whose temperature is regulated to within 0.1 °C by an immersion circulator (sous-vide stick or water tank). Because the core temperature never exceeds the water temperature, the food cannot overcook.
The process is simple but requires patience: you choose the target temperature according to the desired doneness (e.g. 54–56 °C for a medium-rare entrecôte, 62–65 °C for juicy chicken breast, 50–52 °C for silky salmon) and cook, depending on thickness and connective tissue, from 45 minutes up to 24–48 hours for tough cuts such as shoulder or shank. Meat is then seared briefly and hard in a hot pan, with a torch or on the grill so that roasting aromas (the Maillard reaction) and an appetising crust develop.
Sous-vide is ideal for anyone who wants a reproducibly perfect result: in professional kitchens cuts are pre-cooked, chilled and only finished à la minute, which relieves pressure during service. At home it pays off for meat and fish lovers who care about exact doneness. Food safety matters: at low temperatures (below 55 °C) food must not be cooked too long, and chilled items belong quickly in the fridge.
What to watch for: use only food-grade, heat-resistant pouches, salt sparingly (it can change texture over long cooking times) and never skip the sear – without a crust sous-vide meat tastes bland. A household sous-vide stick costs roughly CHF 90–200 in Switzerland, a vacuum sealer CHF 60–250 (guide prices, no guarantee). In restaurants you can often recognise sous-vide by especially evenly cooked, tender cuts.