Preheat oven for 350 degrees
In a small bowl combine the sugars and cocoa powder together.
Once risen, lightly flour a surface and roll dough out until approximately 12×15 rectangle.
Brush the butter across the entire surface.
Evenly sprinkle the cocoa powder and sugar mixture across the dough. If adding, chocolate chips, evenly sprinkle across.
Starting on one side, roll the dough into a log.
Cut the log length wise carefully so there are two long pieces.
Starting at one end, pinch the ends together and then braid the two pieces together and pinch together again at the end.
Carefully place in a well greased loaf pan.
Place in oven for 35-40 minutes or until done.