Sirloin at 55°: Roast beef

Where the loin ends and the hip begins. The grain coarsens slightly compared with the striploin, and in exchange the beef flavour deepens — which is why many people prefer it as a steak. Choose bright scarlet meat with a fine, tight grain rather than a dark or loose surface. It holds less fat than the striploin, so stopping one stage earlier is the safer call.

True sirloin sits behind the loin; many labels blur it with rump — ask where it was cut. Cook Sirloin as Roast beef to 55° at the centre. Plate as Kebabs. Angle 3: check thickness before the clock. A cut’s grain comes from how much the muscle worked. Sirloin needs heat through to 55° before “Roast beef” makes sense. 55 is a stage of that heat, not a luxury score. The same cut becomes a stew, a grill, or a braise, so a steak minute does not cover a pot. Thick connective tissue wants time, not a hard sear alone. This is not medical advice.

Cook Sirloin as Roast beef to 55° at the centre. Thick grain needs more time. A cut’s grain comes from how much the muscle worked. Sirloin needs heat through to 55° before “Roast beef” makes sense. 55 is a stage of that heat, not a luxury score. The same cut becomes a stew, a grill, or a braise, so a steak minute does not cover a pot. Thick connective tissue wants time, not a hard sear alone. This is not medical advice.