The Collaborative International Dictionary of English v.0.48:

Tidbit \Tid"bit`\, n. [Tid + bit.]
   A delicate or tender piece of anything eatable; a delicious
   morsel. [Written also titbit.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Titbit \Tit"bit`\, n.
   Same as Tidbit. [Chiefly Brit.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

titbit
    n 1: a small tasty bit of food [syn: choice morsel, tidbit,
         titbit]