Mini Blueberry Babka (or Bakhallah?)

I wanted to make mini babkas in a pan. I saw a recipe for babkas with challah dough, or babkallah, and used a blueberry filling.

Chocolate Babka Bundt Cake

We were going to a friend's house for dinner, and Doug said I would I bring a cake.
   
But I wanted to make a chocolate babka. So I mashed up a recipe based on Smitten Kitchen's chocolate swirl muffins in a bundt pan, and used her Better Babka filling and syrup.