Put the ingredients in the order listed in a pot to come to boil until they become a homogeneous mixture. Leave the prepared mixture to cool.
Crumble 7 oz (200 g) of plain biscuits and 2/5 cup (100 g) walnuts. Add them to the cooled mixture.
Form balls from it and roll them in coconut flakes, walnuts, sprinkles etc. (optionally, for decoration). Leave them in the fridge for about 2 hours.