Before evaluation the frozen burgers were cooked for 7 min on one side, turned over and cooked 5 min at 220–240 °C in a conventional oven. The cooked samples were maintained warm in an oven until testing within 3–8 min and cut into quarters and served to the panellists in random order. Each sample was coded with a randomly selected 3-digit number. Panellists were instructed to cleanse their palates between samples using water. Each sample from Lot FBSM and Lot RBM was evaluated in one separate session given a total of three sessions.