Beat the butter, sugar and eggs until thick and creamy. Crumble the cookies and stir into the mousse with the cocoa and port, then knead a firm dough. Form a roll about 30 cm long, wrap in aluminum foil and rest in the refrigerator for about 2 hours.
Before serving, cut “sausage slices” 1 cm thick.
Wrap any leftovers repeatedly in aluminum foil and keep in the refrigerator.
Tip: Feel free to use better chocolate – the more delicious the result!