Melt 4oz of butter and half a tin (normal size) of condensed milk.
Be careful not to let it boil.
Crush a packet of malt biscuits until quite fine.
Chop up a packet of Eskimo's into smallish bits.
Mix it all together and on grease-proof paper, shape into a 'log'.
Sprinkle all over with coconut.
Wrap up grease-proof paper around the log and place on hard surface in fridge, preferably overnight.