I have a similar recipe - it is for a choc mint log though. Going from memory it is:

1 packet of choc ripple biscuits
1/2 can condensed milk
1 peppermint crisp.
coconut to coat

I whizz the biscuits and peppermint crisp in the food processor, add the condensed milk. Form into two logs, coat with coconut. LEave to harden in the fridge for about a day if you can wait that long. Slice into pieces whatever thickness you desire.

It is a CWA recipe from their blue recipe book. Recipes from Australia wide. I am not at home so I can't double check the recipe or the name of the book. but it is very simple, and yummy.