Wikipedia-Eastern and Central European babka, especially among Christians, is a spongy, brioche-like yeast cake that is traditionally baked for Easter Sunday. The cake is traditional in the lands of the former Polish-Lithuanian Commonwealth, namely Poland, Lithuania, Slovakia, Belarus, Ukraine, and Western Russia , as well as among the Rusyns (Ruthenians) in northeastern Hungary and all over Romania, where it is called "colac". Darra Goldstein, professor of Russian at Williams College says "babka comes from baba, a very tall, delicate yet rich yeast-risen cake eaten in Western Russia and Eastern Poland."Traditional babka has some type of fruit filling, especially raisins, and is glazed with a fruit-flavored icing, sometimes with rum added. Modern babka may be chocolate or have a cheese filling.