Mix water, milk, and yeast in a bowl and dissolve the yeast.
Now add 1 egg.
Add the remaining ingredients, except for the soft butter and chocolate.
When the dough is firm, take the soft butter and knead it well into the dough.
Now chop the chocolate of your choice and knead it in.
Let the dough rise for about 50 minutes.
When the dough has risen, form buns (this makes about 12 buns).
Now distribute the buns in a baking pan, letting them touch each other.
Let them rise again for 40 minutes.
Brush them with the remaining egg and bake them for 15 minutes at 200 degrees Celsius (392 degrees Fahrenheit) or until they are golden all over.
Now they can be enjoyed warm. Bon appétit.