Sous Vide Short Ribs (72 Hours at 135°F)
By Samantha Brooks · Sous-Vide Specialist · Updated 2026-05-08
Beef short ribs sous vide at 135°F for 72 hours — converts tough connective tissue while keeping the meat at medium-rare. Salt only. The wow-the-guests dish.

Carnivore sous vide short ribs are 2 pounds of bone-in beef short ribs sealed with 1 teaspoon of salt and cooked in a 135°F water bath for 72 hours, then seared hard in cast iron for 90 seconds per side. The long hold at low temperature converts the abundant connective tissue (collagen) into gelatin while keeping the meat itself at medium-rare temperature — the result is short ribs as tender as braised but as pink as a steak. Salt is the only seasoning. A 6-ounce cooked serving (one bone-in short rib) delivers 36g protein, 28g fat, and 400 calories. Bone-in short ribs cost $9 to $14 per pound; a 2-pound rack feeds 3 to 4 adults at roughly $7 to $10 per serving. Sous vide unlocks combinations of doneness and tenderness that aren't possible by any other technique — short rib is the showcase application. Plan ahead: the cook starts 3 days before service.
Ingredients
| Ingredient | Protein | Fat | Calories |
|---|---|---|---|
| 6 oz short rib cooked (per serving) | 36g | 26g | 380 |
| ¼ tbsp tallow (per serving) | 0g | 3g | 25 |
| Coarse salt | 0g | 0g | 0 |
| Per serving | 36g | 28g | 400 |
Macros per serving (after cooking and any fat draining). Source: USDA FoodData Central.
Instructions
- 1
Pat short ribs dry. Apply 1.5 tsp coarse salt across all surfaces.
- 2
Vacuum-seal in a sous vide bag — keep ribs in a single layer for even cooking.
- 3
Set sous vide circulator to 135°F. Submerge ribs and cook for 72 hours.
- 4
If the water bath evaporates over 3 days, top up with hot water to maintain the level. Cover the bath with plastic wrap or a lid to slow evaporation.
- 5
After 72 hours, remove ribs from bag. Pat surfaces completely dry with paper towels — wet surface prevents crust formation.
- 6
Heat 1 tbsp tallow in a 12-inch cast iron skillet over high heat until smoking.
- 7
Sear ribs 90 seconds per side, all sides — total 4 to 6 minutes.
- 8
Transfer to a cutting board. No rest needed. Serve whole or slice between bones.
Nutrition per Serving
Frequently Asked Questions
Why 72 hours?
The collagen in short rib connective tissue converts to gelatin at temperatures above 130°F over time. At 135°F, full conversion takes about 48 to 72 hours. Below 48 hours the ribs remain noticeably chewy; above 96 hours the texture starts to break down too much (mushy). 72 hours is the sweet spot for steak-like color with braise-like tenderness. At higher temperatures (165°F+) collagen converts in 4 to 6 hours but the meat reaches well-done.
Is 72 hours at 135°F safe?
Yes. USDA pasteurization tables show that beef held at 135°F for 1 hour is equivalent to instant pasteurization at 156°F. 72 hours at 135°F is more than 70x the pasteurization minimum. The vacuum-sealed bag prevents recontamination, and the temperature is well above the 130°F threshold where pathogen growth stops. The technique is standard in fine-dining kitchens for short ribs; restaurant health departments approve it because the math works.
Can I do this in 24 hours instead?
Sort of. At 165°F for 24 hours, short ribs reach the same tenderness but cook to well-done — no pink, more like braised ribs. Different texture but still good. At 145°F for 24 hours, ribs are tender but not as fully converted; some chewiness remains. The 135°F-for-72-hours cook is the only combination that delivers both medium-rare color AND fall-apart tenderness; any shortcut compromises one or the other.
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