Take grated chocolate in a microwave safe bowl and melt in microwave oven
It will take approximately 1 minute if it is in room temperature.
Stir the melted chocolate well.
Line a plate with butter paper and unpack the butter cookies.
Take one cookie and dip it into melted chocolate and coat well.
Take out the chocolate coated cookie and place it on the lined plate.
Sprinkle some sugar balls on top.
Follow the same process for the remaining cookies.
Now keep the chocolate coated cookies inside the refrigerator for half an hour.
Take out the cookies from refrigerator and serve them or store them in an airtight container.