The eight days of Hanukkah, the Jewish celebration of lights, honor the sacred lamp in the Holy Temple, which burned for eight days even though it only contained enough oil for one. Traditionally, many Hanukkah foods celebrate the oil in addition to the light. One of the most common is the jelly doughnut, known as sufganiyah. The word derives from the Hebrew word for "sponge," an apt description for the texture of the doughnuts. I think they are more accurately "pillowy."