Overview
Sirloin steaks are a budget-friendly alternative to premium cuts like ribeye and filet, offering robust beef flavor with less marbling. Sous vide cooking transforms this leaner cut by preventing moisture loss and ensuring even doneness from edge to edge. While sirloin won't have the buttery richness of ribeye, it delivers excellent beefy flavor and firm texture that many prefer. The key to great sirloin is not overcooking it—aim for medium-rare to medium for optimal tenderness and juiciness.
Core Time & Temperature
| Doneness | Temperature | Time | Max Time |
|---|---|---|---|
| Rare | 120°–128°F | 60–90 min | 4 h |
| Medium Rare | 129°–134°F | 1 h 30 min–2 h | 4 h |
| Medium | 135°–144°F | 2 h | 4 h |
Cooking time depends on thickness, not weight. Measure at the thickest part.
Food Safety Notes
For beef cooked below 145°F / 63°C, pasteurization occurs through sustained heat over time. At 129°–134°F / 54°–57°C (medium-rare), hold for at least ninety minutes to achieve pasteurization. Always sear the exterior in a ripping-hot pan or grill to eliminate surface pathogens. Serve immediately. USDA recommends 145°F / 63°C with a three-minute rest for instant kill, but sous vide's time-temperature control provides equivalent safety at lower temperatures.
See our food safety guide.
Texture Profiles
- 120°–128°FRare
- Cool red center with firm texture.
- 129°–134°FMedium Rare
- The sweet spot for sirloin—pink center with optimal tenderness.
- 135°–144°FMedium
- Firmer texture with warm pink center—good for those who prefer less pink.
Prep & Bagging
- Dry brine with kosher salt one hour before bagging (up to 4 h for thicker cuts)
- Pat surface completely dry with paper towels
- Season with freshly cracked black pepper and optional aromatics (thyme, garlic)
- Vacuum seal or use zip-top bag with water displacement method
- If bags float, weigh them down with a heavy spoon or clip to vessel side
Finishing & Searing
- Remove steak from bag and pat completely dry with paper towels
- Chill steak in freezer for 5 min to prevent overcooking during sear
- Heat cast iron or carbon steel pan over highest heat until smoking
- Add high smoke-point oil (avocado, grapeseed, or clarified butter)
- Sear forty-five to sixty seconds per side without moving
- Add butter and aromatics for final thirty seconds if desired, basting continuously
- Rest three to four minutes, then slice against the grain at a slight angle