Flank at 65 degrees: Fajitas · 483

The grain should run clearly in one direction, and the silverskin should already be trimmed away. Sear the outside hard, then always cut at a right angle to the grain. Cutting with the grain ruins it. Abdominal muscle with a coarse but remarkably consistent grain. That consistency is the whole trick: slice it thinly against the grain and a tough cut becomes dramatically tender.

Colour, sinew, where the fat sits, and thickness are what you check before you pay. Ask for the thickness that matches “Fajitas.” Use 65 degrees and 65 when you cook. Salt after you know the job. Do not play with undercooked meat. Cook Flank to 65 degrees and serve it as “Fajitas.” The other figure to watch is 65. Do not time a hard-working muscle like a thin steak. Colour before heat is not doneness. Whole-muscle flank is usually ungraded at retail; grain direction matters more than the stamp.

Cook Flank to 65 degrees and serve it as “Fajitas.” The other figure to watch is 65. Do not time a hard-working muscle like a thin steak. Colour before heat is not doneness. Whole-muscle flank is usually ungraded at retail; grain direction matters more than the stamp. A cut’s grain comes from how much the muscle worked. Flank needs heat through to 65 degrees before “Fajitas” makes sense. 65 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.