This treat is simply irresistible and is one of the timeless delights

2. Now fill the butter biscuits in layers, alternating with the cocoa mass, into a loaf tin lined with parchment paper or cling film, and the bottom layer must be made of cocoa and the top layer must be made of biscuits.

3. Next, it’s best to put the cold dog in the fridge overnight, then turn it out of the mold and peel off the foil. Finally cut into thin slices.