The traditional Eid cookie listed as cuisine associated with Eid al-Adha is ma'amoul.
Ma'amoul is a filled butter cookie from the Arab world, especially associated with the Levant and wider Middle Eastern cuisine. Its dough commonly contains semolina and butter, while fillings include dates, figs, pistachios, walnuts, or other nuts. The cookies may be round, domed, or flattened.
Wooden moulds called tabe give ma'amoul their distinctive patterns, and the designs can sometimes help identify the filling. The Arabic name comes from a verb meaning “to do” or “to make,” so it broadly suggests something made or prepared.
Ma'amoul is strongly associated with holiday hospitality. Arab Christian communities serve it around Easter, while Muslim families prepare it for Eid, particularly Eid al-Fitr, and it may also appear during Eid al-Adha. It is often offered with coffee or tea. Halva, lokum, and baklava are also festive sweets, but they are not the specific cookie named in the question.