The Collaborative International Dictionary of English v.0.48:

Cruller \Crul"ler\ (kr[u^]l"l[~e]r), n. [Cf. Curl.]
   A kind of sweet cake cut in strips and curled or twisted, and
   fried crisp in boiling fat. [Also written kruller.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

cruller
    n 1: small friedcake formed into twisted strips and fried;
         richer than doughnuts [syn: cruller, twister]