In a pan take sugar, cornstarch, salt and sugar mix it well

Now take milk and pour it slowly mix it without any lumps and stir continously

Now keep it in medium flame on gas

Now stir it continously untill it become thick

Now add cream and dark chocolate and mix it untill it chocolate melts completely

Add vanilla ecense and mix it well

Switch off flame

Pour it in to glass and know put it in fridge and garnish with grated chocolate or gems