A Doughnut Cutter is a special hand-held and operated cutting tool that cuts out a circle, and then a small circle at the centre of that circle. To use, you you roll out the doughnut dough first, then press the cutter into the dough, and twist the cutter to cut out the shape. You can get doughnut cutters that will make heart-shaped holes. Commercially, machines push doughnut batter out in rings of batter straight into the hot oil.