The original recipe listed ambiguous quantities (e.g., "150 500g sticks," "1 tub-full"). This version uses standardized, realistic measurements for a home kitchen yield. Adjust sugar based on your cocoa's bitterness.
For a richer flavor, substitute margarine with unsalted butter or cocoa butter.
Store in the refrigerator for up to 2 weeks. Let sit at room temperature for 10 minutes before serving to soften.
If using real rum instead of extract, reduce the amount of water added.