Combine the cranberries, sugar, bourbon, apple cider and split vanilla bean in a saucepan over medium-low heat. Stir the ingredients together. Bring the mixture to a simmer and let it bubbly and simmer for about 15 minutes, until the cranberries begin to break down and the mixture thickens. Remove it from the heat and let it cool to thicken even more.
I like the leave the vanilla bean in until serving, just for extra vanilla bean flavor! You can reheat this to serve it and it stays great in the fridge.