Place biscuits in a large ziplock bag and crush them using a rolling pin until you have small and coarse crumbs. Transfer crumbs to a large bowl and stir in nuts.

In a medium bowl place chocolate and butter. Heat in the microwave or in a double boiler until melted and smooth. Add milk and alcohol, if using, and stir. Add chocolate mixture to crumb mixture and mix until combined.

Spread the mixture out on parchment paper or plastic wrap and shape it into a log using a spatula or spoon. Roll up the paper and wrap it like candy. Place in the fridge for several hours until firm.

After chilling, remove log from the paper, dust with icing sugar from all sides, and remove any excess sugar with a brush—or your fingertips if you don’t mind getting messy. Cut into pieces and serve.

Keep in the fridge or freezer. If kept in the freezer, place at room temperature for a few minutes before cutting or serving.