Sift the flour and cocoa powder together.
Separately mix sugar, salt, and yeast.
Add lukewarm milk and eggs, then knead the dough.
Add butter and knead until smooth.
Let the dough rise.
Divide and round the dough into balls.
Add chocolate chips and shape the dough.
Place on a pan and allow for a second proof.
Bake in a 180°C oven for 20 minutes.