How to Sous Vide Pork Tenderloin

Why sous vide suits a lean tenderloin

Pork tenderloin is the leanest cut on the pig, which makes it delicious and unforgiving in equal measure: it goes from perfect to dry in the space of a couple of minutes in a hot oven, because you are chasing a safe internal temperature with a much hotter surface. Sous vide removes the chase. You hold the whole loin at one exact temperature in a water bath, so it cooks evenly edge to edge, cannot overshoot, and stays juicy at a doneness that would be nerve-wracking to hit in a pan. Then a fast, hard sear gives it the crust the bath cannot. We have not cooked this ourselves — it is the standard method, grounded in USDA safety guidance.

Season and seal

Trim the silverskin (the shiny membrane) off the loin, since it stays tough, then season simply: salt, pepper, and whatever you like — a sprig of rosemary or thyme, a smashed garlic clove, a little oil. Seal it in a bag; you do not need a vacuum sealer, as the water-displacement methodworks perfectly — lower a zip-top bag into the water so the pressure pushes the air out, then seal it above the line. A tenderloin is long, so either use a large bag or cut it in half to fit your pot, and keep it in a single layer so it heats evenly.

Set the temperature and walk away

Clip the circulator to a pot, set your target, and let the bath come up before the pork goes in. This is where a precise machine earns its place: a circulator like the Anova or the Inkbird, both publishing ±0.1°Caccuracy, holds the exact temperature that sets your doneness. The precise numbers — which temperature gives a blush-pink loin versus a firmer one, and how long a given thickness needs — belong in a chart, and we keep a full one in the sous vide temperature guide; defer to it rather than guessing, because for pork the time and temperature together are also what make it safe. A tenderloin will happily wait past its minimum without overcooking — the method's gift.

The hard sear to finish

Out of the bag the loin is perfectly cooked but pale, so the sear is not optional. Dry it thoroughly with paper towels (a wet surface will not brown), then sear it hard and fast on all sides in a screaming-hot pan with a little high-smoke-point oil — a minute or so per side, just long enough to build a deep brown crust without heating the interior back up. Because the inside is already at your target, the sear is purely about the Maillard browning on the outside, the same sear-after logic as any sous vide protein. Rest it briefly, slice into medallions, and serve.

The safety line: 145°F, or pasteurize by time and temperature

Get this part right. The USDA safe minimum internal temperature for pork is 145°F, followed by a three-minute rest— cook the loin to that and it is safe by the familiar single-endpoint rule. Sous vide also lets you cook pork below that for a juicier result, and when you do, safety comes from something different: time and temperature together. Holding pork at a lower temperature for long enough pasteurizesit — kills the bacteria just as effectively as an instant 145°F — which is the time-and-temperature logic the USDA describes for cooking safely. It only works if you actually hold it long enough, which is why the exact pairings live in the guide and are not something to eyeball.