Hanukkah is a Jewish holiday that celebrates the rededication of the Second Temple in Jerusalem. It is celebrated for eight days and nights, and is often marked by the lighting of the menorah, eating traditional foods, and exchanging gifts. Two popular Hanukkah treats are latkes and potato pancakes. Latkes are fried potato pancakes made from grated potatoes, onions, eggs, and matzo meal, while potato pancakes are made from mashed potatoes, flour, and eggs. Both are served with applesauce or sour cream.