The Collaborative International Dictionary of English v.0.48:

Craunch \Craunch\ (kr?nch), v. t. & i. [imp. & p. p. Craunched
   (kr?ncht); p. pr. & vb. n. Craunching.] [See Crunch.]
   To crush with the teeth; to chew with violence and noise; to
   crunch. --Swift.
   [1913 Webster]