Sufganiyot are jelly-filled donuts that are a popular treat during Purim. The dough is made with flour, sugar, yeast, and eggs, and is then rolled out and cut into rounds. The rounds are fried until golden brown and then filled with a sweet jelly or custard filling. Sufganiyot are often dusted with powdered sugar and are a deliciously indulgent treat that is enjoyed during Purim celebrations.