Hamentashen are triangular pastries traditionally filled with sweet fillings, commonly associated with the celebration of Purim. These delightful treats symbolize the hidden nature of the Purim story, particularly the way in which Esther concealed her Jewish identity. The name 'hamentashen' is derived from 'Haman's pockets,' referring to the villain in the Purim story, Haman, and serves as a reminder of his defeat.