Firstly grind 12 biscuits in a mixer to make a fine powder.

Put biscuit powder in a bowl and add chocolate syrup to knead dough.

Take more than half dough in your palm, make a ball and then flatten it with your palm in a circular shape. It should be half inch thick.

Take a small cup and apply a poly thin inside cup.
Now set circular dough inside the cup just like it will take it's shape and keep it's edges outsides of the cup.

Fill chocolate cup with chocolate syrup.
Now take remaining dough on your palm, again make a ball and then flatten it with your palm in a circular shape.
Now paste this second circular dough on the top of the cup and stick edges of both dough piece. flip cup in a plate and remove cup and then plastic sheet from chocolava cake.

Now decorate with sprinkles and silver balls.