A cruller was a fried pastry made from a rectangle of dough, cut in the middle allowing it to be pulled over and through itself producing twists in the sides of the doughnut.
In 1953, Douglas Pabst offered to provide Herbert Rossoff with crullers along with fresh donuts, as a bribe to stop Rosoff from leaving Incredible Tales magazine to work for Galaxy. (DS9: "Far Beyond the Stars")