It`s so weird to call these “Hamantashen” since I`m used to their Hebrew name, Ozney Haman (which literally means- the ears of haman). These crisp and filled cookies are made especially for Purim, the happiest holiday (to my humble opinion…). I won`t bother you with the full history background of these cookies, but if this interest you, you could find nice explanations in many sites.
These cookies are basically circles short pastry filled with all sorts of fillings (usually poppy seed filling, chocolate, or dates), which are folded to triangle shape and baked until crisp. You really don`t need Purim as an excuse to make these.
One of the most complicated things about these cookies is getting the cookies to remain at their original shape while baking. I found that if you chill the filled and shaped cookies before you bake them, they generally tend to lose their shape, the solution is to chill the shaped and filled cookies before baking (preferably overnight).