Measure the sugar and 6 tablespoons of water into a small pan and heat gently over a low heat, until the sugar has dissolved, stirring occasionally. Turn up the heat and boil briskly for 3-4 minutes until it becomes a thin syrup. Set the processor running and pour in the hot syrup through the funnel on to the chocolate so it melts and becomes liquid. Add 2 tablespoons boiling water. Next add the egg yolks and process for a few seconds before adding the brandy. If you are not using a processor, beat the ingredients together.