Pour the wine into a small saucepan and add the sugar and star anise. Put the pan over a high heat and stir until the sugar dissolves, then bring to a boil and bubble for 10 minutes, until the wine thickens to a syrup.
MAKE THE CHOCOLATE SAUCE
Tip the butter, cream, golden syrup, sugar and cocoa powder into a medium saucepan. Bring to a simmer and allow everything to combine. Add a little salt and stir in the chocolate. Scrape the vanilla from the pod and into the chocolate sauce.
Finish by pouring in the red wine syrup and season to taste with a little more salt if necessary. Serve up over ice cream, or any dessert you like!