You asked for sirloin at the counter, and the sign said porterhouse. Or New York steak. Three different labels, same cabinet, same cut — depending on where in Australia you shop and who trained your butcher.
Australians eat 22.4 kg of beef per person each year (Meat & Livestock Australia, 2024). Sirloin is one of the cuts driving that number, and yet the naming confusion around it trips up home cooks, online shoppers, and anyone trying to follow an American recipe.
This guide explains exactly what sirloin steak is, why it carries three names in Australia, how it compares to other popular cuts, and how to cook it — with temperatures in Celsius.
TL;DR: In Australia, sirloin, porterhouse, and New York steak all describe the same boneless cut from the beef short loin. Australians consume 22.4 kg of beef per person per year (MLA, 2024). For perfect medium-rare, pull sirloin from the heat at 52°C and rest five minutes to reach 54°C.
The MLA Beef Yield Guide puts each striploin — the primal sirloin is cut from — at approximately 4.49% of carcase weight. That makes it one of the smaller but most prized primals on the animal: two per beast, modest in yield, consistently in demand.
Sirloin comes from the short loin of the hindquarter, behind the rib cage and above the rump. The muscle is the longissimus dorsi, the same long back muscle that runs from the ribs all the way through the loin. At the rib end of this muscle, it's cut as scotch fillet (rib eye). Further back, in the short loin zone, it becomes sirloin.
At the end of the muscle, the longissimus dorsi is leaner and slightly firmer. It carries a fat cap — a strip of external fat running along one edge — rather than heavy internal marbling. That fat cap is not cosmetic. It renders during cooking and bastes the lean muscle from the side, adding flavour you'd otherwise have to source from butter or oil.
Working front to back along the hindquarter: rib section → short loin → rump → round. Sirloin occupies the short loin. Beneath it, separated by a thin membrane, is the tenderloin — the muscle that becomes eye fillet.
That's why T-bone steak exists. A T-bone is a bone-in cross-section cut through the short loin that captures both the sirloin strip above and a piece of tenderloin below, connected by the T-shaped vertebra. Remove the bone, trim away the tenderloin, and what remains is a boneless sirloin steak — what Australians variously call porterhouse or New York.
Australians maintained or increased their red meat consumption at a rate of 78% in metropolitan areas, according to MLA's Consumer Sentiment Research (2025) — yet even committed meat-eaters struggle with the naming of the cut they're buying. Sirloin, porterhouse, and New York steak are interchangeable at Australian butchers and supermarkets. As the Australian Farmers butcher's guide states directly: "Sirloin steak a.k.a. porterhouse steak or New York steak." Three names. One cut.
Australian butchery developed its terminology alongside, but independently of, both British and American traditions. "Porterhouse" is where the confusion really starts — because in Australia and the US, the word refers to completely different steaks.
| Name | Used In | Means |
|---|---|---|
| Porterhouse | Australia | Boneless sirloin (striploin), no tenderloin |
| Porterhouse | United States | Bone-in steak: sirloin strip + large tenderloin section (must be ≥1.25 inches of tenderloin under USDA standards) |
| New York Strip / New York Steak | US & Australia | Boneless sirloin — same as Australian porterhouse |
| Sirloin | International standard | Boneless short loin steak |
Under the US Department of Agriculture grading, a steak must have a tenderloin section at least 1.25 inches wide to qualify as a porterhouse. Smaller than that and it's a T-bone. In Australia, no such regulation exists. Porterhouse simply means boneless sirloin, with no tenderloin included.
The practical upshot: if a recipe from the US, UK, or Europe calls for "sirloin steak" or "New York strip", ask your Australian butcher for sirloin or porterhouse. Same cut, same result.
According to the Australian Farmers butcher's guide, sirloin, porterhouse, and New York steak are synonymous terms in the Australian market — all referring to the same boneless short loin cut. This naming divergence from international standards is one of the most common sources of confusion for Australian cooks following overseas recipes, and no single explanation of why it happened exists in mainstream food media.
Of the two striploins per animal — each representing approximately 4.49% of carcase weight (MLA Beef Yield Guide, 2020) — the sirloin earns its place by sitting squarely in the middle of the Australian premium steak market. It's leaner and firmer than scotch fillet, more flavoursome than eye fillet, and more tender than rump.
| Cut | Tenderness | Marbling | Flavour | Best Cooked | Relative Price |
|---|---|---|---|---|---|
| Eye Fillet | ★★★★★ | Low | Mild | Pan, grill | $$$$$ |
| Scotch Fillet | ★★★★☆ | High | Rich, buttery | Pan, grill, BBQ | $$$$ |
| Sirloin / Porterhouse | ★★★★☆ | Low–Med | Bold, beefy | Pan, grill, BBQ | $$$ |
| T-Bone | ★★★☆☆ | Low–Med | Beefy + tender | Grill, BBQ | $$$ |
| Rump | ★★★☆☆ | Low | Strong, robust | Quick-sear, BBQ | $$ |
Sirloin's position in this ranking is what makes it genuinely practical. It's tender enough to eat at medium-rare without fighting it, flavoursome enough to hold its own without a sauce, and priced for regular cooking rather than only special occasions. Eye fillet wins on tenderness; scotch fillet wins on richness. Sirloin wins on balance.
For a broader breakdown of all Australian primal cuts, see our [INTERNAL-LINK: complete guide to Australian beef cuts → comprehensive beef primal and cut reference] - Coming Soon
Australia produces approximately 62% of its cattle as grass-fed and 38% as grain-finished (Meat & Livestock Australia, 2024), and that production split shapes the flavour range you encounter when buying sirloin. The same cut from a pasture-raised animal tastes noticeably different from a 100-day grain-fed steak — not better or worse, just different.
Grass-fed sirloin carries a more mineral, complex flavour — earthy, slightly gamey, and assertive. The muscle is darker red. The fat along the cap often runs yellow-tinged from beta-carotene absorbed from pasture, which is normal and not a quality defect.
Grain-fed sirloin is more consistent in colour and flavour. Milder, slightly sweeter, with creamier white fat. Most premium butcher-grade sirloin labelled "100-day grain-fed" or similar falls here. The muscle is a brighter cherry red, and the eating experience is more predictable.
Wagyu sirloin is a different animal entirely — literally. High-BMS Wagyu (MB5–MB9+) produces intramuscular fat throughout the muscle that normal sirloin doesn't carry. At MB9, it eats more like scotch fillet than lean sirloin. Worth trying at least once; not necessarily an everyday steak.
In all cases, the fat cap is your friend. Don't trim it before cooking. Let it render during the cook, and trim at the table if you prefer leaner eating.
Because sirloin is leaner than scotch fillet, it responds best to high direct heat and should not be pushed past medium without becoming tough. According to Steak School by Stanbroke, the target internal temperature for medium-rare is 52°C when removed from the heat, rising to a final 54°C after a five-minute rest. A meat thermometer removes the guesswork entirely.
1. Rest before cooking — Pull the steak from the fridge 30 minutes ahead. Cold meat sears unevenly and drops the pan temperature.
2. Pat dry — Moisture on the surface creates steam, not crust. Paper towel, both sides, right before cooking.
3. Season — Coarse salt and cracked black pepper immediately before it hits the pan. Don't pre-salt for pan-searing; you want a dry surface.
4. Heat the pan — Cast iron on high until smoking. A neutral oil with a high smoke point works best: rice bran, grapeseed, or refined avocado oil.
5. Sear — 2–3 minutes per side for a 250–280 g steak. Don't move it. Let the crust develop undisturbed.
6. Render the fat cap — In the final 30 seconds, stand the steak on its fat cap edge and hold it with tongs. The fat renders down into the muscle as it cooks.
7. Baste — Add a knob of butter, a garlic clove, and a thyme sprig. Tilt the pan and spoon the butter continuously over the steak for the final minute.
8. Rest — Off the heat onto a board, loosely covered with foil, five minutes. Non-negotiable. This is where the carry-over cooking finishes and the juices redistribute. Cut too early and they run onto the board instead of staying in the meat.
9. Slice against the grain — Find the direction of the muscle fibres and cut perpendicular to them. Shortening those fibres is the difference between tender and chewy.
| Doneness | Remove from Heat | After 5 min Rest | Appearance |
|---|---|---|---|
| Rare | 46°C | 49°C | Deep red centre, very soft |
| Medium-rare | 52°C | 54°C | Pink throughout, springy |
| Medium | 58°C | 60°C | Light pink centre, firmer |
| Medium-well | 63°C | 66°C | Faint pink, quite firm |
| Well done | 68°C | 70°C | No pink — not recommended for sirloin |
Source: Steak School by Stanbroke / Food Standards Australia New Zealand
The BBQ method follows the same logic — high direct flame, one flip per side, rest off the heat. A kettle or gas grill with the lid closed approximates oven-finish and is good for thicker cuts over 3 cm.
Australia's AUS-MEAT marbling scale runs from MB0 (no visible marbling) to MB9 (abundant marbling), with standard retail sirloin typically sitting at MB1–MB3 and premium grain-fed reaching MB5 or above. That number is a useful starting point — but it's not the only thing to look at when buying.
Colour is the most reliable first indicator. Look for cherry red on fresh-cut sirloin. Vacuum-packed steak runs slightly purple from oxygen deprivation and blooms back to red within 10 minutes of opening — that's normal. Grey or brown tones on the cut surface mean age or poor cold-chain management. Pass on those.
Beyond colour:
Fat cap — It should be present and cream-to-white in colour. Grass-fed beef often shows a yellow-tinged fat cap from beta-carotene, which is fine. Avoid steaks with the fat cap trimmed right off; that's flavour removed before you've even started.
Thickness — At least 2.5 cm. Anything thinner is difficult to sear properly without overcooking the centre.
Marbling — For sirloin, MB1–MB3 is normal and produces a good eating experience. MB5+ is a step up in richness. MB7–MB9 enters Wagyu territory and changes the nature of the steak considerably.
Grass-fed vs grain-fed — Choose by flavour preference, not a quality hierarchy. Both can be excellent. Look for MSA (Meat Standards Australia) grading from MLA on the label when buying online — it means the eating quality has been assessed by a consumer sensory panel and meets a documented minimum standard. Generally, most meats sold in Australian butchers are grass-fed.
Buying online, you can't touch or smell the steak. Product descriptions that include the marbling score, production method (days on feed or pasture-raised), breed, and ageing method give you the most to work with. Descriptions that say only "premium sirloin" tell you very little.
Explore our [INTERNAL-LINK: sirloin steak range → Pryde Butchery sirloin product page] for grass-fed, grain-fed, and Wagyu options with full product details.
Yes. In Australia, sirloin, porterhouse, and New York steak are the same boneless short loin steak. The name varies by retailer, state, and butchery tradition — not by the cut itself. With Australians eating 22.4 kg of beef per person per year (MLA, 2024), this is among the most bought and most mislabelled cuts in the country.
Both come from the same longissimus dorsi muscle, but from different sections. Sirloin is from the short loin — leaner, firmer, with a fat cap. Scotch fillet is from the rib section — more heavily marbled, softer, richer in flavour. Sirloin yields approximately 4.49% of carcase weight per striploin (MLA Beef Yield Guide, 2020). Scotch fillet commands a higher price for its marbling.
For medium-rare, remove sirloin from heat at 52°C internal temperature and rest five minutes to reach a final 54°C. Use a meat thermometer — guessing by touch is inconsistent, especially with leaner cuts that toughen quickly past medium. Temperatures are from Steak School by Stanbroke, aligned with FSANZ guidelines for whole-cut beef steaks.
Under US Department of Agriculture rules, a porterhouse must include a tenderloin section at least 1.25 inches wide. In Australia, no such definition exists — porterhouse simply means boneless sirloin, with no tenderloin. Australian butchery developed this terminology independently, creating a naming inversion that still confuses cooks following American recipes today. See our Complete guide to Global Steak cuts for more on how Australian cut names differ internationally.
Yes. Sirloin provides approximately 27 g of protein per 100 g cooked, 1.7 mg of iron, and 4.9 mg of zinc — around 44% of the daily zinc requirement — according to USDA Food Data Central data. It's one of the leaner premium beef cuts. Trimming the fat cap before eating further reduces saturated fat without affecting protein content.
Sirloin, porterhouse, and New York steak are three names for one cut. Once you know that, the confusion at the counter — or halfway through an American recipe — disappears.
It's a boneless short loin steak: lean, beefy, firm enough to hold a crust, forgiving enough for a Tuesday. Cook it hot, rest it at 54°C, slice against the grain. Everything else is preference.
Key takeaways:
