Beat the cream cheese, 1/2 cup of the sugar, the cocoa powder, milk and vanilla extract in a medium bowl with an electric mixer until fluffy.
Spread in the chocolate cookie crust.
Beat the heavy cream with the remaining 2 tablespoons of the sugar in a second medium bowl with an electric mixer until soft peaks form, then spread over the cream cheese layer. Top with shaved chocolate.
Courtesy of Food Network Magazine, Photograph by Antonis Achilleos