GANACHE
In a medium microwave-safe bowl, combine chocolate chips and heavy cream. Microwave on high for 15 seconds at a time, whisking together with a fork after each interval. Once the chocolate has melted into a shiny, smooth sauce (about 45 seconds total) transfer to the fridge to cool for 15 minutes.
Recipe Notes
To Assemble:
Place the cool layer of cake on serving platter. Spread the top with 1/3 of the whipped cream. (If you want to pipe out the rope pattern, place whipped cream in a large pastry bag fitted with a 2C tip. Pipe circles on that are slightly overlapping around the cake.)
Drizzle 1/3 of the cooled ganache over the whipped cream. Sprinkle 1/3 of the chopped cookies. Add next layer of cake and repeat. Store in fridge until ready to serve.