Hamantasen are a 3-corner shaped cookie.  Traditional fillings are poppy seeds or prune but they are made with many different flavors, including date or apricot.  For children, parents sometimes make chocolate-filled hamantaschen.  We have chocolate dipped cookies.

The hamantasch symbolizes the three-cornered hat that Haman wore.

It is thought that they were originally call mon-taschen (Yiddish "poppy seed pockets") but modern legend has it that Haman, the villain of Purim, wore a triangular hat.  In Israel, they are called Oznei Haman (Hebrew for "Haman's ears").  (Taken from Wikipedia, the free encyclopedia).