Cracknel

from The Collaborative International Dictionary of English v.0.48

Cracknel \Crack"nel\ (kr?k"n?l), n. [F. craquelin, fr. D.
   krakeling, fr. krakken to crack. See {Crack}, v. t.]
   A hard brittle cake or biscuit. --Spenser.
   [1913 Webster]