Myhrvold has acquired three such branders and has successfully deployed them in his 21st-century oven (to the horror of his antiques dealers). “You sit it atop the bread while it bakes, and it makes an indented pattern in the loaf,” he explains, amused at the idea of resuscitating something so old. To make his own mark on bread history, Myhrvold created a Modernist Cuisine brander—with a modern twist. It’s extruded in bronze from a 3D printer.