Return to a boil. Insert a candy thermometer. When it approaches 230° start paying close attention. When candy thermometer reads 242° remove from heat. (Temperature matters a lot! If you let it get too hot, it will form a very hard candy, rather than the soft caramel. But good news, since this recipe has a lot of cream in it, it buys you a little flexibility). Mix in vanilla, salt, cinnamon and cardamom. When you’re sure it’s well mixed, pour into your prepared pan and let cool completely.
