Heat 85ml of whipping cream in a small saucepan until it begins to boil. Pour over the dark chocolate and stir until smooth. Set aside to cool.
In a bowl, beat softened cream cheese, powdered sugar, cocoa powder, and vanilla extract until smooth.
Add the cooled chocolate mixture to the cream cheese mixture and blend until fully combined.
Whip cold whipping cream in a chilled bowl using an electric mixer until medium peaks form.
Gently fold the whipped cream into the cream cheese mixture until incorporated.
Spoon the filling into the liners, filling them to the rim.
Refrigerate for 4-5 hours, then freeze for a firmer texture. Thaw in the fridge for 3-4 hours before serving.