Jewish apple cake is a dense cake made with apples and sold mostly in Pennsylvania in the United States. Apples (or quinces in Israel) are common in Ashkenazi cooking and are a part of the tradition of Rosh Hashanah (the Jewish New Year). Jewish apple cake is also non-dairy, and it may therefore be eaten with meals containing meat, in accordance with Jewish laws of kashrut.
It is made with vegetable oil, unlike other American cakes, which are usually made with butter. Therefore, under the laws of Kashrut, you can eat it after a meat meal under the Jewish dietary laws that prohibit mixing meat and milk. Foods cooked with oil are eaten at Hanukkah.