This month the sourdough recipe for Sourdough Surprises is to make a brioche dough and use it to make a babka.
I've never made either brioche is rich bread with high egg and butter content or babka. Babka can be a twisted loaf with cinnamon and/or chocolate or a Urkraiain sweet bread usually containing raisins often made for Easter.
I was not able to participate due to illness and time constraints but wanted to link to the blog to have easy access to the recipes. I do plan to try these breads someday.