In a large mixing bowl add lukewarm milk, 2 tsp of sugar and sprinkle a package of active dry yeast into it. Cover, and let the yeast activate. This will take approximately 10 minutes.
To this add egg yolks, sugar, melted butter, salt, all purpose flour and knead for about 8 to 10 minutes to form smooth dough.
Coat a bowl with oil. Place the dough in it, cover with plastic wrap/warm towel and set it in warm place for about 1 hour or until its doubled in size.
Transfer the dough onto a well floured working surface and divide it into 4 equal parts.
Meanwhile melt the nutella in microwave oven for 30 seconds or place melt the nutella using a double boiler.
Now roll a portion of the dough into a 10-12 inch circle. Take a round plate for reference and create an impression on this first layer.
Using spoon or knife, spread a thin layer of nutella within the marked impression.
Roll the second portion of the dough into a circle as above. Place it on the previous layer and create a impression once again using the round plate.
Again spread the nutella within the marked impression. Repeat the procedure for the third portion of the dough.
Then cover it with last or fourth layer, place the round plate and cut the excess dough with a sharp knife. (we can bake this excess dough separately).
Place a small glass at the center of the dough as a reference.
Leaving the centre intact (portion covered by the glass), use a sharp knife and divide the layered dough into quarters. Divide each quarter into half and repeat until you have 16 equal parts.
Take 2 neighboring parts at a time and twist them twice in opposite direction of each other and then pinch the ends together. Repeat this for all 16 parts. At the end you will have 8 beautiful flower petals.
Transfer this to baking sheet and let it rest for about 20 minutes.
While the dough is resting, pre-heat the oven to 350 degree F.
After 20 minutes, brush the dough with egg whites and bake the bread for about 20 minutes or until its done.
Nutella Braided Bread is ready. Let it cool down for 10 minutes before serving. Enjoy.