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Sous Vide Ribeye (Cast Iron Finish)

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Sous vide ribeye is the most foolproof steakhouse dinner you can cook, and it needs nothing but salt and pepper. A hand-selected ribeye holds in a warm water bath until every inch hits medium rare - no gray band, no carryover math, no guesswork - then drops into a screaming-hot cast iron for the crust. The water handles the doneness. The fire handles the finish. What lands on the board is edge-to-edge pink under a dark, mahogany sear, all from one cut and two seasonings.

A whole sous vide ribeye seared in cast iron, resting on a round wood board with flaky sea salt this recipe

The one thing to know about sous vide is that it splits the job in two. The bath is the cook: set it to your target temperature and the steak comes up to exactly that number, edge to edge, and simply holds there. The sear is the finish: a hot cast iron pan, sixty seconds a side, builds the crust the bath cannot. It is the same control-the-cook thinking behind our wagyu strip steak and the indoor crust on a cast iron filet mignon. Salt it, pepper it, and let the water do the rest.

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Why You'll Love This Sous Vide Ribeye

  • Edge-to-edge medium rare. The bath locks doneness in at temperature - no gray band, no carryover to predict, no overcooking possible.
  • Just salt and pepper. No marinade, no sauce, no compound butter required. A ribeye this good is a celebration of the beef.
  • Built for the bath, finished by the fire. Water does the slow, even cook; cast iron does the crust. Two tools, one steakhouse plate.
  • Mostly hands-off. Season, seal, and drop it in - the bath runs itself while you pour a drink and set the table.
  • The calculator takes out the guesswork. Dial in your thickness and doneness below and the bath temp, bath time, and sear all reflow.

Sous Vide Ribeye Ingredients

A short list, and the steak is the star. See the recipe card below for exact quantities.

  • Boneless ribeye, 1.5 to 2 inches thick (about 12 to 16 oz)
  • Kosher salt and freshly cracked black pepper
  • 1 tablespoon unsalted butter and a sprig of thyme or rosemary, optional (for the bag)
  • High-smoke-point oil (avocado or grapeseed), for the cast iron sear
  • Flaky finishing salt - Florida Pure Sea Salt Pure Flaked

Sous Vide Ribeye Time & Temp Calculator

Set your thickness and target doneness and the calculator returns your bath temperature, the bath time, the cast iron sear, the rest, and where the steak lands edge to edge. The recipe is built around a 1.5-inch ribeye at medium rare, but the numbers move with the cut.

Find Your Cook Time

Set thickness and target doneness. The bath temperature is the doneness; the bath time scales with thickness. The cast iron sear and rest stay quick because the steak is already cooked through — the pan is only building crust.

Bath Temp 129°F water
Bath Time 90 min minimum
Cast Iron Sear 45–60s per side
Rest 2–3 min short
Final 129°F edge-to-edge
Why the bath temp is the doneness

Sous vide cooks the steak to the exact temperature of the water and holds it there. So the bath temperature you choose is the final doneness, edge to edge — 129°F water gives a 129°F medium-rare steak with no gray band and no carryover to predict. Thickness only changes how long the center takes to catch up to the water, which is why bath time grows with a thicker cut while the temperature stays put. The quick cast iron sear adds barely a degree.

Pat it bone-dry before the sear. The single most important move between the bath and the pan. A wet surface steams instead of searing, and the bag liquid is the enemy of the crust. Pull the steak, discard the bag juices, and pat every side completely dry — that is what makes a 60-second sear actually crust.

USDA recommends 145°F internal for whole-cut beef. Medium rare at 129–135°F is a culinary standard. Pregnant, immunocompromised, very young, or elderly diners should cook to 145°F. For sous vide held below 130°F, keep total time under the recommended pasteurization window.

How to Sous Vide a Ribeye

Five steps, and the bath does most of them for you. Season, seal, and submerge; then pat dry, sear hard, and slice. Exact times are in the recipe card.

A ribeye seasoned with kosher salt and cracked pepper, going into a sous vide bag with butter and a sprig of thyme

Season and bag

Pat the ribeye dry and season generously with kosher salt and cracked pepper on both sides. Slip it into a sous vide bag with a tablespoon of butter and a sprig of thyme, then seal - a vacuum sealer, or the water-displacement method with a heavy zip bag.

A sealed ribeye in a sous vide water bath with an immersion circulator clipped to the side

The sous vide bath

Heat the bath to 129°F for medium rare. Submerge the bag, clip it to the side, and let the water cook for 90 minutes to 2 hours. Edge-to-edge pink locks in at temperature - no overcooking, no carryover to predict. Walk away.

Pat bone-dry

Pull the bag from the bath, lift the ribeye out, and discard the bag liquid - it will stop a crust from forming if it hits the pan. Pat the steak very dry on all sides. This is the single most important move before the sear.

A sous vide ribeye searing in a screaming-hot cast iron pan with a deep mahogany crust

Sear hot, sear fast

Cast iron over high heat for 5 to 7 minutes until ripping hot. Add a drizzle of neutral oil, then lay the ribeye in away from you. Sear 45 to 60 seconds per side. Stand it on the fat-cap edge for 20 to 30 seconds to crisp. Chase mahogany, not black.

Sliced sous vide ribeye fanned on a wood board showing the edge-to-edge pink interior, finished with flaky salt

Slice and finish

Move the ribeye to a cutting board and rest just 2 to 3 minutes — sous vide cooks evenly through the cut, so the rest is short. Slice against the grain, half an inch thick, and finish each slice with a flake of Florida Pure Sea Salt. Pass the board around.

Can You Sous Vide Without a Machine?

The bath and the cast iron sear are the whole method. Here is how to run it with whatever you have.

  • No vacuum sealer? A heavy-duty zip bag and the water-displacement method work fine. Lower the bag into the bath slowly until the water pressure pushes the air out, then seal the top.
  • No immersion circulator? A large pot, a reliable thermometer, and a little babysitting will hold a bath close enough - nudge the burner to keep it near temperature. A dedicated circulator just makes it effortless.
  • No cast iron? Heavy carbon steel is the next-best pan. Skip standard non-stick - it will not get hot enough to crust.
  • Mind the surface. However you sear, a bone-dry steak is what makes the crust. Pat it again right before it hits the pan.

Substitutions

  • No ribeye? A New York strip or a thick sirloin sous vide beautifully the same way - same bath temp, same sear. Leaner cuts just want a touch less time at temperature.
  • No butter for the bag? Skip it. The butter helps the seasoning distribute, but the ribeye's own marbling carries plenty of flavor on its own.
  • No avocado or grapeseed oil? Any neutral, high-smoke-point oil works for the sear - refined canola or light olive oil. Skip extra-virgin and butter; both burn before the pan is hot enough.
  • Different finishing salt? Any flaky sea salt works in a pinch, but the larger, crisp flakes of Florida Pure Sea Salt give you that gentle crunch on the first bite.

Variations

  • Compound butter crown. A pat of Cow's Rule Bleu Cheese & Chive compound butter melted onto the rested slices. Steakhouse plate, no extra work.
  • Garlic-thyme bath. Add a smashed garlic clove and an extra sprig of thyme to the bag for a gentle aromatic lift on the finished slices.
  • Surf-side board. Slice it, shower it with flaky salt, and set it out family-style to share after a day on the water.
  • Smoky finish. Pass the rested steak briefly through smoke from a smoldering chunk of pecan or oak on a side burner for a kiss of coastal woodfire.

Equipment

A short kit, picked once and kept forever. The circulator and the cast iron do the real work.

  • An immersion circulator. The heart of the method - it holds the bath at an exact temperature so the steak comes up to a perfect, even doneness on its own.
  • A heavy cast iron skillet. Gets ripping hot and stays there, building the dark mahogany crust the bath cannot.
  • Long, sturdy tongs. For turning the steak in the screaming-hot pan and standing it on the fat edge with control.
  • A vacuum sealer. Optional but tidy - pulls a clean seal for the bath. The water-displacement method with a zip bag is the free alternative.

Storage

Refrigerate leftover sliced ribeye in an airtight container for up to 3 days. To reheat without overcooking, drop the slices back into a 129°F bath for 15 minutes, then a quick sear in the cast iron if you want the crust restored. Better still - cold ribeye slices on toast the next afternoon, with horseradish cream and pickled red onion. Sous vide stays tender either way. Cooked steak does not freeze well; freeze the raw ribeye instead and thaw fully in the fridge before cooking.

Top Tip - The Water Is the Thermometer

With sous vide you do not chase an internal number with a probe - you set the bath to the doneness you want and the steak simply becomes that temperature, edge to edge. Pick 129°F for medium rare and the whole ribeye lands at 129°F, no gray band, no carryover to predict. All the skill moves to the finish: pat the steak bone-dry, get the cast iron screaming hot, and keep the sear to about a minute a side so you build crust without cooking past your number.

Water handles the cook. Fire handles the finish.

Why sous vide a ribeye at 129°F?

Because 129°F is the exact internal temperature for medium rare. Sous vide cooks the steak to that temperature edge to edge and holds it there, so there is no overcooking possible and no carryover to predict. The water is the recipe — choose a different bath temperature to dial the doneness up or down.

How long can I leave a ribeye in the sous vide bath?

90 minutes to 2 hours is the sweet spot for a 1.5-inch ribeye. Up to 4 hours at 129°F is safe and fine; beyond about 4 hours the long heat starts to break down the texture and the steak turns soft.

Why pat the steak dry before searing?

A wet surface steams instead of searing, so it will not crust. The sous vide bag liquid is the enemy of the crust. Discard the bag juices and pat every side completely dry - a bone-dry surface is what makes the quick 60-second sear actually work.

Is sous vide ribeye cooked entirely indoors?

Yes. The bath and the cast iron sear both happen on the countertop and stovetop, so this is a fully indoor method — no grill required. It is one of the most reliable ways to cook a steakhouse ribeye in any kitchen.

More Steak Dinners to Try

If this ribeye earned a spot in the rotation, these are the cuts to cook next - same idea, same payoff: control the cook, build the crust, finish with confidence.

More Beef & Steak Recipes

From a special-occasion wagyu strip steak to a two-zone reverse sear tomahawk, here is where to go deeper on cooking great beef at home.

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Sous Vide Ribeye (Cast Iron Finish)

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Description

Sous vide takes the guesswork out of a ribeye. The water bath holds the steak at exactly the doneness you want, edge to edge, then a screaming-hot cast iron builds the crust. Salt and pepper only - the beef is the star. A fully indoor, foolproof steakhouse dinner.

Ingredients

Scale
  • 1 boneless ribeye, 1.5-2 inches thick (about 12-16 oz)
  • 1 tablespoon kosher salt
  • 1 teaspoon coarsely cracked black pepper
  • 1 tablespoon unsalted butter (for the bag)
  • 1 sprig thyme or rosemary, optional (for the bag)
  • 1 tablespoon neutral oil, such as avocado or grapeseed (for the sear)
  • Florida Pure Sea Salt Pure Flaked, for finishing
  • Optional: 1 tablespoon compound butter, for the rested slices
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Instructions

  1. Pat the ribeye dry. Season both sides generously with kosher salt and cracked pepper.
  2. Slip the steak into a sous vide bag with the butter and thyme. Seal by vacuum sealer or water displacement.
  3. Heat the water bath to 129°F for medium rare.
  4. Submerge the bag, clip it to the side, and cook 90 minutes to 2 hours.
  5. Pull the bag from the bath. Lift out the steak and discard the bag liquid.
  6. Pat the ribeye completely dry on all sides.
  7. Heat a cast iron skillet over high heat until ripping hot, 5 to 7 minutes. Add the oil.
  8. Sear the steak 45 to 60 seconds per side. Stand it on the fat edge for 20 to 30 seconds.
  9. Move the steak to a cutting board and rest 2 to 3 minutes.
  10. Slice against the grain, half an inch thick. Finish with flaky Florida Pure Sea Salt.

Notes

The bath temperature is the doneness: 129°F gives edge-to-edge medium rare. Choose a higher bath temp for more done.

Pat the steak bone-dry before searing - a wet surface steams instead of crusting.

  • Prep Time: 5 minutes
  • Cook Time: 2 hours 5 minutes
  • Category: Dinner
  • Method: Sous Vide
  • Cuisine: American

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