Identification of optimal ranges in ribeye area for portion cutting of beef steaks.

Restaurant-ready (21-d aged, needle tenderized) loin steaks (strip, S; and T-bone, TB) representing three portion sizes (227, 284, and 340 g for S; 397, 454, and 510 g for TB) were portioned from 71 low-Choice beef carcasses representing seven ribeye size groups (70.9 cm2 and less to 103.2 cm2 and greater, in 6.3-cm2 increments). Steaks (n = 568) were cooked on a grooved grill to temperatures of either 67 or 77 degrees C and evaluated for cooking characteristics, sensory attributes (n = 284), and shear force (n = 284) to identify optimal ribeye areas for portioned steaks. As expected, thickness of all portioned steaks decreased (P < .05) as ribeye size increased, whereas thickness of steaks increased (P < .05) as portion size increased. The S were significantly thicker than TB. The TB cooked faster (P < .05) than did S for ribeye areas 77.4 to 83.8 cm2 in the average portion sizes and for ribeye areas 71.0 to 96.6 cm2 in the large portion sizes. However, S cooked significantly faster than did TB for ribeye areas less than 70.9 cm2 in the average portion sizes. The S had higher (P < .05) initial tenderness scores and lower (P < .05) shear values than did TB. Initial tenderness scores were lower (P < .05) for ribeye areas greater than 103.2 cm2 compared with ribeye areas less than 83.8 cm2 and 90.3 to 96.6 cm2, with all others being intermediate. Shear force tended (P = .08) to follow the initial tenderness results. The S cooked to both end point temperatures, and TB cooked to 67 degrees C had higher (P < .05) initial tenderness scores than did TB cooked to 77 degrees C. Tenderness was reduced in TB cooked to higher temperatures as well as in S and TB portioned from ribeye areas greater than 103.2 cm2. Steaks portioned from carcasses with ribeye areas between 77.4 to 96.6 cm2 can optimize both cooking time and tenderness for the foodservice sector.