This is a great cake. It's great with coffee or tea and it isn't a sweet cake.
Back in the 50s through 80s my mother belonged to an organization made up of many branches that raised money for Children’s Hospital in Columbus, OH. Each branch was called a Twig (she was in Twig 21) and every year they held a huge Bazaar. My mother would bake Bopkas and eventually people started calling ahead of time to reserve a quarter of a cake. The cost went up each year and the last I remember it was $3.50 a quarter and that was in the late 60s.
My brother liked to toast a slice (the loaf pan style) and put a little butter on it. This cake keeps and freezes well in the loaf style. I am sure the tube style would freeze well also.
*This is definitely a cake, not a bread (like Challah) as some of the Babkas I have seen in the bakeries.