The Collaborative International Dictionary of English v.0.48:

flavorful \flavorful\ adj.
   tasteful; having a good taste; -- of food. tasteless

   Syn: flavourful, flavorous, flavourous, flavorsome,
        flavoursome, sapid, saporous.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

flavorful
    adj 1: full of flavor [syn: flavorful, flavourful,
           flavorous, flavourous, flavorsome, flavoursome,
           sapid, saporous]

The Jargon File (version 4.4.7, 29 Dec 2003):

flavorful
 adj.

    Full of flavor (sense 2); esthetically pleasing. See random and losing
     for antonyms. See also the entries for taste and elegant.