Chocolate truffles

Method

1. Break up the chocolate, chop finely and put into a mixing bowl with the butter.
2. Place the cream and sugar in a saucepan and bring just to the boil. Pour the cream onto the chocolate and butter and beat until it is smooth and shiny. Freeze for a few hours, until firm enough to shape.
3. Mix the cocoa and icing sugar together. Dust a baking sheet lined with baking paper with half of the cocoa sugar. Spoon the truffle mix onto the baking sheet. Use a spatula to spread it into a rectangle 4cm x 28cm x 3cm deep – use a ruler to get straight sides. Dust with the remaining cocoa sugar. Put into the freezer until firm. Use a sharp knife dipped in hot water to cut into 1cm slices. Chill until ready to serve.