Chocolate lace cookies

In a saucepan over low heat, melt the chocolate and butter. When fully melted, pour this into a medium sized bowl. Add the caster sugar, egg and sifted flour, baking soda and cocoa. Mix well to amalgamate. Cover and place in the fridge for about 15 minutes or until the mixture firms up enough to handle. Preheat the oven to 180°C/340°F. Roll leveled tablespoons of mixture into balls then roll generously in icing sugar - the look of the final cookie will depend on how well it’s covered in icing sugar. Place the balls on the prepared baking sheets, set apart to allow for spreading. Bake for about 15 minutes. Cool slightly on the tray before moving to wire racks.