Step by step

Divide the dough into three equal parts into three separate containers and add to each the bitter liqueurs and cocoa

Tips
Two tips: you can omit the butter and the ‘beans’ will be more crisp. And, secondly, you can also use icing sugar instead of caster sugar.
Trivia
Pellegrino Artusi also discusses different versions of the ‘Beans of the Dead’ in his kitchen writings.