Line the bottom and sides of a 9" spring-form with parchment paper. Make sure there's a little extra hanging out of the bottom.
Arrange the cookies on the bottom of the pan slightly overlapping the cookies. Break them a little to make them fit.
Pour half of the chocolate mixture over the cookies and spread it out evenly.
Place the second layer of cookies and pour the remaining chocolate filling on top. Smooth out the chocolate.
Place the pan in the fridge and chill it for at least 3 hours or overnight.
Grate the chocolate on top, slice and serve.