Source : Webster's Revised Unabridged Dictionary (1913)

Bonbon \Bon"bon`\, n. [F. bonbon, fr. bon bon very good, a
   superlative by reduplication, fr. bon good.]
   Sugar confectionery; a sugarplum; hence, any dainty.

Source : WordNet®

bonbon
     n : a candy that usually has a center of fondant or fruit or
         nuts coated in chocolate