A long twisted doughnut topped with sugar or glaze, its name is from the Dutch for "twisted cake"
[DOC] [TLE] Crullers (Dunkin' Donuts) | Cycling Forums [PAR] Jan 18, 2004 ... a long twist, fried and sprinkled with granulated sugar or brushed with ... "cruller" 
comes from the Dutch krulle, meaning "twisted cake.