Follow the Easy Vegan Caramel Sauce recipe from veganbaking.net, with the modifications below. It tasted a bit burnt and overly bitter to me when I used the full cooking times. Shortening the cooking times and adding a bit of additional sweetener after cooking seemed to balance the sweet/bitter balance for me--but your preferences may be slightly different.

Heat the sugar for only about a minute past the time when it's entirely liquefied. This will probably be 6 to 8 minutes max. Add the coconut milk at that point, using a long spoon or spatula to avoid spattering hot liquid onto your hand.

Remove from heat within a minute of adding and stirring in the coconut milk.

After removing from stove, add the following, if desired: 2 to 4 tablespoons rum and 2 to 4 tablespoons maple syrup or agave nectar.