Break chocolate into pieces and melt with butter in the microwave.
Stir in condensed milk, coconut and crushed biscuits.
Press into a standard sized rectangle slice tray that has been greased and lined with baking paper.
Refrigerate.
Melt the block of plain chocolate and spread evenly over the top.
Refrigerate for a couple of hours or until completely set and hardened.
Cut into slices.
Recipe Notes
TIPS FOR FREEZING SLICES
you can freeze the slices as a whole or cut into individual pieces;
wrap the slice in plastic wrap then wrap in a layer of foil and place into an airtight container in the freezer (these 3 steps will keep your slices tasting great!);
slices with a soft filling (or cheesecakes) don’t tend to freeze well;
slices kept in the freezer will taste best within the first month, but can last longer.