In a large mixing bowl, combine the flour, sugar, yeast, and salt until well mixed.

Add the warm milk, melted butter, and beaten egg. Stir until a dough begins to form.

Transfer the dough to a floured surface and knead for about 5 minutes until smooth and elastic.

Place the dough back in the bowl, cover it, and let it rise in a warm area for about 1 hour, or until it has doubled in size.

Once risen, roll out the dough into a rectangle shape on a floured surface.

Evenly spread Nutella across the dough.

Sprinkle cinnamon over the Nutella-covered dough.

Roll the dough tightly from one end to the other and slice into rolls.

Arrange the rolls in a greased baking dish. Cover and allow them to rise for another 30 minutes.

Preheat your oven to 350°F (175°C) and bake the rolls for 20-25 minutes until golden brown.

Drizzle powdered sugar over the warm rolls before serving.