On a floured work surface, roll the dough out to a ½-inch thickness. Using a doughnut cutter
(if you don't have one, use one larger and one smaller round cutters) dipped in flour, cut out the doughnuts and place on a parchment-lined baking sheet. (You can roll any leftover dough scraps into balls for more doughnut holes.) Cover with a clean dish towel and allow to rest for 1 hour.