Crumble the sponge base (leftovers). Put the fat in a mixing bowl. Grate chocolate finely in the butter. Sift 10 g cocoa on top. Add the liqueur, almonds and sponge crumbs and knead lightly with the dough hooks of the hand mixer.
Put the mixture in a cool place for about 30 minutes. Form about 40 small balls from the Baileys mixture, turn one half in icing sugar and turn the remaining balls in remaining cocoa. Store balls in a dry place. Makes about 40 pieces