I did read the blog, and does explain well. I have used a small quantity of cocoa in my breads in times past. That gave a neat visual presentation.. The flavor was just a slight hint of cocoa. Bread was Delish.I did read a blog that claimed that the chocolate starter add flavor to things like pancakes and an extra depth to chocolate desserts.
I would have to try it myself some time to see though.
These are Yeast raised breads.
After initial kneading, and before first rise, I separated dough into 2 portions. I kneaded the cocoa into one portion. They went thru first rise in separate containers. I rolled them afterwards into 2 separate flat layers. Placed one on top of other,,,,, and rolled up. Second rise,, and then baked.