The questions cooks actually ask.

Four things: an immersion circulator, a container that holds water (a stockpot works), bags that seal (zip-lock freezer bags are fine to start), and a torch or screaming-hot pan for the finishing sear. That is the whole list. Skip the marketing bundles. See the equipment guide for what to buy.

Around $150 if you buy the circulator new and use what you already own for the container and bags. A reliable Anova or Breville Joule runs $120 to $200. Add maybe $20 for zip-lock freezer bags. You do not need a vacuum sealer for your first six months.

Yes, when you respect time and temperature. Pasteurization is a function of both: lower temperatures need longer holds to kill the same pathogens. Baldwin's tables (used throughout the database) give you safe combinations for every thickness and target doneness. The danger zone (40 to 130 degrees F) matters only for the time food spends there, so quick heat-up and proper bath temps keep you safe.

Yes. Add roughly 50% to the cook time for a frozen 1-inch steak, more for thicker cuts. The bath thaws and cooks in one pass with no quality loss because there is no overcook risk. Bag-seal your proteins before freezing so they go straight from freezer to bath.

Zip-lock freezer bags work fine for cooks under four hours at temperatures below 180 degrees F. Use the water displacement method: lower the open bag into the bath until water pressure pushes the air out, then seal. For long cooks (24+ hours) or temperatures above 180, get a vacuum sealer. Cheap bags can fail at high temps or over long durations.

For tender cuts (steak, chicken breast, fish), texture degrades after the maximum hold time. Proteins keep denaturing slowly even at low temps, so muscle fibers go mushy and connective tissue over-converts. For tough cuts (chuck, shank, pork shoulder) the window is wider because collagen-to-gelatin conversion is the goal. Check each ingredient in the database for its specific max hold.

For whole-muscle beef, 130 degrees F is the floor for full pasteurization within practical times. Below that, you cannot pasteurize on any reasonable timeline. Poultry has its own floor (typically 136 degrees F minimum for breast, with extended holds). Ground meats and fish have stricter rules because pathogens distribute throughout the protein, not just on the surface.

Every entry cites its source (Baldwin, Kenji at Serious Eats, ChefSteps, Anova). Differences across sources are usually about texture preference, not safety. A 129-degree steak from Kenji and a 131-degree steak from ChefSteps are both safe with the right hold time. We surface the source so you can pick the school of thought you trust.

Pasteurization is a log-reduction of pathogens (typically a 6.5-log or 7-log reduction of salmonella, depending on the protein). At sous vide temperatures, the kill is slow, so it requires sustained time at temperature. Baldwin's tables convert this to practical numbers: at 135 degrees F a 1-inch chicken breast pasteurizes in about 84 minutes; at 145 degrees F it takes about 23 minutes.

Heat penetration scales roughly with the square of thickness. A 2-inch steak does not take twice as long as a 1-inch steak; it takes about four times as long to reach core temperature. Once the core hits target, pasteurization holds add on top of that. The predictor handles thickness math for you.

Sear after, every time. Pre-searing does not add flavor that survives the bath and it adds a thin overcooked layer. A post-bath sear delivers Maillard crust on a perfectly cooked interior. Pat the surface bone-dry first; water on the protein kills sear quality.

Three rules. Dry the surface with paper towels until it looks matte. Use the hottest pan you own (cast iron or carbon steel, smoking hot) or a torch with a Searzall diffuser. Sear fast (under 60 seconds per side) so the heat does not push the interior past target. Oil the protein, not the pan.

Yes, and you should. Bag juices are concentrated stock plus rendered fat. Strain them, reduce in a hot pan, mount with butter, and you have an instant pan sauce. Discard only if the protein was held below 130 degrees F or had questionable freshness going in.

The gray band is overcooked meat between crust and core. Two causes: sear too slow (heat creeps in) or rest too long before sear (residual heat pushes interior). Fix both by chilling the cooked protein in an ice bath for 5 minutes before searing if you want maximum edge-to-edge pink, then sear ripping hot for under a minute per side.

Pick the highest target temp and stage the cooks. Start the longest-cooking item, then add shorter cooks at intervals. Or use the "transfer" trick: pull the hotter item, drop the bath to the lower temp by adding ice, then add the second item. For dinner-party scale, two circulators in two containers is the clean answer.

You held it past its maximum time. Steak texture degrades after about 4 hours at typical medium-rare temperatures because muscle fibers keep slowly denaturing. Pull it at the recommended window (1 to 4 hours for a 1-inch steak at 130 to 134 degrees F). If you need to hold longer for scheduling, drop the bath to 129 degrees F.

Sous vide chicken cooked below 145 degrees F has a different mouthfeel than oven-roasted: more tender, slightly more "raw-looking" pink near the bone (which is safe if pasteurized). If it feels slimy or stringy, you went too low or held too long. Try 145 degrees F for 1.5 hours on a boneless breast as a calibration cook.

Probably not if a large portion broke the surface for more than a few minutes. Floating means air or steam in the bag, which insulates the protein from the bath. Re-submerge with a heavy plate or sous vide weights and add 20% to the cook time to compensate. For long cooks, double-bag and clip the bag's top to the container edge.

Yes. Salt after the bath, just before the sear. Pre-bath salting is a small flavor win, not a requirement. What you cannot do is rescue a long over-salted cook, so when in doubt, salt light pre-bath and finish at the sear. Avoid pre-salting more than 45 minutes before bagging or you risk a cured-meat texture.

Any well-reviewed immersion circulator in the $120 to $200 range from a known brand. Look for at least 800 watts of heating power, accuracy to within 0.5 degrees F, and a clip that fits standard containers. Skip no-name circulators under $100; temperature accuracy is the whole point of this method. See the equipment guide for current picks.

No, a stockpot works for short cooks. For anything over 4 hours or batch sizes above two proteins, a 12-quart polycarbonate food-service container is the right answer: stable, well-insulated, and accepts a lid with a circulator cutout. Add an insulated lid or ping-pong balls on the surface for cooks over 12 hours. See the equipment guide for sizes.

Edge sealers (the countertop kind) suck air through a channel and seal one edge. They are fine for dry proteins but fail on wet brines, marinades, or anything liquid. Chamber sealers evacuate the whole chamber, so they handle liquids cleanly and produce a deeper vacuum. Chamber units start around $700 and are overkill for home cooks who do not batch-process. See the equipment guide for both categories.

Reusable silicone bags are good for short cooks at moderate temperatures (under 4 hours, under 170 degrees F) and reduce plastic waste. They are not great for long cooks because the seal can weaken, and they take up more drawer space than plastic. For most home cooks, freezer-grade zip-locks plus an occasional vacuum-sealed batch covers everything. See the equipment guide for current recommendations.