Combine the sugar and water in a heavy-bottomed saucepan and stir to ensure that all the sugar is moistened. Bring to a boil over high heat, stirring constantly. When the syrup comes to a boil, stop stirring and skim the surface to remove any scum. Continue to cook without stirring until the syrup reaches the thread stage (215° to 230°F/102° to 110°C). Remove from the he