To make a dry caramel, pour the Caster sugar into a saucepan and cook over a medium heat.
Don’t touch the pan while the sugar is turning into caramel. When a caramel starts to form, pick up any remaining uncooked sugar by swirling the pan around. Let your caramel take on an even golden-brown colour. Lower the heat if the caramel browns too quickly around the edges of the saucepan. Cook until you have a smooth brown caramel. Your dry caramel is ready.