Prepare the moulds by spraying them with cooking spray
Combine sugar, golden syrup and water in a medium pot over medium heat. Let the sugar dissolve and starting boil.
Don't stir the mixture and just let it boil until it reaches 146-150 C°. Using a cooking or candy thermometer, check the temperature and once it reaches 146 C° remove from heat.
Stir in the extract of your choice, and food colouring if using.
Pour mixture into moulds, and allow to cool completely.
Notes
Do not under any circumstances use powdered sugar instead of granulated sugar as it will not work.