1. Grate chocolate and mix with butter until combined. Add 3tbsp of the cocoa powder, the apricots, walnuts and rum, and mix until it forms a sticky mixture which holds together.
2. Sprinkle a large plate with the remaining cocoa powder.
3. Take one tablespoon of mixture between the palms of your hands and roll into a ball, then coat with cocoa. Repeat until all the mixture has been used. Leave to cool in the refrigerator for at least four hours.
Recipe courtesy of California Walnuts