Crush biscuits finely using a food processor or in a plastic bag with a rolling pin.
Cut fruit puffs into halves or quarters and freeze for 20 minutes for easier cutting.
Melt butter gently and mix with condensed milk and vanilla extract. Cool slightly before combining.
Mix crushed biscuits into the butter-condensed milk mixture. Fold in fruit puffs in batches.
Shape the mixture into a log, roll it in desiccated coconut, and wrap tightly in plastic wrap.
Chill in the refrigerator for at least 4 hours or overnight. Slice and serve when firm.
