In a mixing bowl, combine flour, sugar, yeast, and salt.

Add warm milk, melted butter, and beaten egg. Mix until a dough forms.

Knead the dough on a floured surface for about 10 minutes until smooth.

Place the dough in a greased bowl, cover, and let rise for 1 hour or until doubled in size.

Preheat the oven to 180°C (350°F).

Once risen, punch down the dough and roll it out into a rectangle.

Sprinkle the chopped chocolate evenly over the dough.

Roll the dough tightly into a log and cut into 8 equal pieces.

Place the pieces on a baking sheet lined with parchment paper.

Brush the tops of the rolls with milk and sprinkle with sugar.

Bake in the preheated oven for 15-20 minutes until golden brown.

Remove from the oven and let cool slightly before serving.