Place the almonds and hazelnuts in a 320°F/160.0°C oven to warm them.
Combine the sugar and water in a saucepan and boil to soft ball stage (239°F/115.0°C).
Remove from the heat and add the warmed nuts. Mix continuously with a heatproof spatula until the nuts are completely covered with sugar. (Because of the movement, the sugar will crystallize and s