Sugar, the butter, syrup and condensed milk mix in a medium saucepan. Stir over medium heat until sugar is melted. Allow to boil without stirring more, the fire fell and boil 5 minutes. Removing the pan from the heat, add the crushed biscuits, almonds and grated chocolate. Stir until chocolate is melted. Pour into greased square baking dish. Cooled until firm. Cut into small squares, arranged on a tray and cool before serving.