Sous Vide: A Beginner's Guide to Precision Cooking
By Dana Cole | Reviewed by Chef Daniel Pryce
Published · Last reviewed · 2 min read
Key takeaways
- Sous vide cooks food in a precisely temperature-controlled water bath, so temperature sets the doneness and the food cannot overcook past it.
- You need three things: an immersion circulator, a container of water, and a way to bag the food.
- Time sets tenderness and pasteurisation, not doneness, so longer is usually safe within reason.
- Sous vide adds no browning, so you finish with a hot, fast sear for crust and colour.
Sous vide is cooking food, usually sealed in a bag, in a water bath held at a precise temperature, so the temperature you set is the doneness you get and the food cannot overcook past it. It is the simplest way I know to get consistent results. This is the beginner’s guide I wish I’d had.
How it works
A device called an immersion circulator heats and circulates water to an exact temperature and holds it there. Your food, sealed in a bag, comes up to that temperature and stops, because it can never get hotter than the water. Set a steak to 130°F (54°C) and it becomes a uniform medium-rare from edge to edge, with none of the grey band a hot pan leaves1. For the why in more detail, see how sous vide works.
Temperature vs time
This is the idea that unlocks everything:
- Temperature sets doneness. Choose the temperature for the result you want.
- Time sets tenderness and safety. Longer makes tough cuts tender and, crucially, pasteurises the food; it does not change the doneness.
So a steak is “done” at temperature in about an hour, but a tough cut might cook for many hours to turn tender, all at the same doneness. The full reference is our times and temperatures hub.
The kit you need
Three things:
- An immersion circulator (sets and holds the temperature).
- A container or large pot for the water.
- A way to bag the food: a vacuum sealer, or zip-top bags using the water-displacement method (lower the bagged food into the water and let the pressure push the air out). See bags and vacuum sealing.
Phase by phase we explain the gear in equipment explained.
The basic method
- Set the circulator to your target temperature and let the water come up.
- Season and bag the food; remove the air.
- Submerge it and cook for the time the food needs.
- Remove, pat dry, and sear hot and fast for crust; see how to sear after sous vide.
Food safety in one paragraph
Sous vide is safe when you respect time and temperature together: pasteurisation depends on holding food long enough at a given temperature, not just reaching it2. Use reputable charts, avoid long cooks below about 130°F (54.4°C), and cook to standard safe internal temperatures if you are serving people who are pregnant, very young, elderly, or immunocompromised3. Our food-safety guide covers it properly.
Where to start
Cook a steak first, it is forgiving and the results are dramatic, then explore the times and temperatures for everything else.
This guide is general information and one cook’s experience, reviewed by a professional chef. Always follow current food-safety guidance for your situation.
Frequently asked questions
What is sous vide cooking?
Sous vide (French for 'under vacuum') means sealing food in a bag and cooking it in a water bath held at a precise temperature by an immersion circulator. Because the water never goes above your target, the food cooks evenly edge to edge and cannot overshoot that temperature, so a steak set to 130°F (54°C) comes out a perfect medium-rare throughout rather than grey at the edges.
Do I need special equipment for sous vide?
You need three things: an immersion circulator that heats and circulates the water to a set temperature, a container or large pot to hold the water, and a way to bag the food, either a vacuum sealer or zip-top bags using the water-displacement method. That is the core kit; everything else is optional.
Can you overcook food sous vide?
It is very hard to overcook in the usual sense, because the food cannot get hotter than the water, so it will not go past your chosen doneness. But texture can change if you hold food far longer than needed, meat can turn mushy, fish can go soft, so each food has a sensible time window. Within that window, a little extra time is forgiving.
Is sous vide safe?
Yes, when you follow time and temperature together. Safety comes from pasteurisation, which depends on holding food at a given temperature for long enough, not just reaching it. Use reputable charts (such as Douglas Baldwin's) and USDA guidance, avoid long cooks below about 130°F (54.4°C), and cook to standard safe temperatures if you are serving higher-risk groups. See our food-safety guide.
Do you sear before or after sous vide?
After. Sous vide produces no browning because the water is well below searing temperature, so the food comes out cooked but pale. You finish it with a quick, very hot sear in a cast-iron pan, with a torch, or on a hot grill to develop the crust and colour. Pat it dry first and keep the sear short so you do not overcook the inside.
References
- Sous Vide Steak Guide, Serious Eats. ↩
- A Practical Guide to Sous Vide Cooking, Douglas Baldwin. ↩
- Safe Minimum Internal Temperature Chart, USDA Food Safety and Inspection Service. ↩
Written by Dana Cole. Reviewed by Chef Daniel Pryce.
Our guides are written from personal experience and reviewed by a professional chef for accuracy. Read our editorial policy.