First of all, add sugar and yeast into the warm milk and rest it for 5 to 7 minutes.

In a big bowl, take flour and salt and mix it well. Add yeast mixture to it and make a soft dough out of it. Now add 2 tablespoon of butter to it and knead it for 8 to 10 minutes until the dough is smooth. Now cover the dough and keep it in a warm place for 1hour or until double in size.

Now take out the dough on a work surface and knock the air out of it. Now divide the dough into 16 equal portions. Now make small balls out of all the portions.

Roll the dough into thin circles with the help of dry flour and apply butter to cover it fully. Now put that aside and repeat with all the remaining dough balls. Make sure that the butter is applied properly and all the butter should be used by the time you finish with the dough balls. Now cover the the pile of the rolled pastry sheets with a cling film and put it in the refrigerator for 2 hours.

After 2 hours, take out the pastry sheets on a working station and roll it into a very big circle with the help of some dry flour. Now divide it into 12 equal triangles.

Now take one triangle and put a piece of chocolate and start rolling it from the bigger part to the smaller part. Repeat the same process with all the triangles. The tip of the triangle should be at the bottom of the croissant so that while baking it does not come out.

Arrange all the croissants on a greased baking tray and brush it with little milk. Rest it for 30 minutes until double in size. Now again brush it with little milk and bake it in the preheated oven at 200 degree for 15 to 20 minutes. As soon as it comes out of the oven, brush it with little butter and cover it with the cloth so that it remains soft.