Crush the digestive biscuits into fine crumbs and mix with melted butter. Press onto the base of a springform pan to form the crust.
Melt the first portion of Caramilk block and set aside to cool slightly.
In a mixing bowl, beat the cream cheese, powdered sugar, and vanilla extract until smooth.
Whip the whipping cream until stiff peaks form, then fold it into the cream cheese mixture.
Add the melted Caramilk to the cheesecake batter and gently fold to combine. Pour the mixture over the prepared crust.
Chill the cheesecake in the refrigerator for at least 4 hours or until set.
For the topping, melt the second portion of Caramilk with whipping cream and drizzle over the chilled cheesecake.
When ready to serve, remove from the pan, slice, and enjoy!