Release the base from a 22cm (base measurement) springform pan and invert. Brush the pan with melted butter to grease. Line the base with non-stick baking paper, allowing the edges to overhang. Secure the base back into the pan.

Combine the coffee and water in a heatproof bowl. Set aside to cool slightly.

Place the biscuits in the bowl of a food processor and process until finely crushed. Add the butter and process until well combined. Transfer to the prepared pan. Use the back of a spoon to spread and press firmly over the base. Cover with plastic wrap and place in the fridge for 30 minutes to chill.

Place the chocolate in a heatproof bowl over a saucepan of simmering water (make sure the bowl doesn't touch the water). Stir with a metal spoon until the chocolate melts and is smooth. Set aside for 5 minutes to cool.

Meanwhile, place the cream cheese, condensed milk and cream in the bowl of a food processor and process until the mixture is smooth.

Add the chocolate and coffee mixture to the cream cheese mixture and process until well combined. Pour the mixture into the prepared pan and use the back of a spoon to smooth the surface. Place in the freezer for 8 hours or until firm.

Remove the cheesecake from the freezer and set aside for 20 minutes to stand (see tip). Use an electric beater to beat the extra cream in a bowl until soft peaks form. Spread the cream over the cheesecake and top with shaved chocolate to serve.