Analysis of information sources in references of the Wikipedia article "Hamantash" in English language version.
In this connection it may be mentioned that for the celebration of Purim there developed among the Jews a special kind of baking. Cakes were shaped into certain forms and were given names having some symbolic bearing on the historical events of Purim. Thus the Jews of Germany eat "Hamantaschen" and "Hamanohren" (in Italy, "orrechi d'Aman"), "Kreppchen," "Kindchen," etc.
...that does not stop people from using the plural even when they are referring to the singular...