Melt the chocolate and add a tbsp of hot water in it.3) Powder the sugar and mix with butter . keep this aside.
In a cup of hot water, add the coco powder, chocolate and mix well.
Mix this with the biscuit mixture and make a smooth dough.6) Roll this like a chappathi , little thicker than chappathi size. 7) Now add the sugar mix and roll the dough.
Cover it with foil or wrapper.
Keep it refrigerated for 3 hrs.10) Cut the roll and serve chilled.