Break the biscuits into small pieces.
Mix biscuits in big pan.

Now take another pan and water sugar and cocoa powder mix well and givd 1 boil.

Now add butter keep stirring and let it boil on low flame for 5 mins.
Off the flame and let it cool a bit.
Now add the vanilla essence and pour the mixture on biscuits and mix it well.
Put the biscuits mixture in a setting bowl and keep in fridge for 1/2 hour.

Now take another pan and put cream and boil it. Givd only 1 boil off the flame add the dark chocolate pieces and keep stirring for a mins till chocolate melts completely.

Now remove the cake from the fridge pour the chocolate mixture and spread evenly.
Now again keep the cake in fridge for 4_5 hours.

Garnish with sweet candies..