01 - In a small saucepan over medium heat, combine the milk, heavy cream, and sugar. Warm until just steaming without boiling.
02 - Remove from heat and add the chopped chocolate. Let stand for 1 minute before whisking until smooth and fully melted.
03 - Stir in the vanilla extract and a pinch of sea salt to enhance the flavor.
04 - Pour the chocolate mixture into shot glasses or small espresso cups and serve immediately.
05 - Top with whipped cream, chocolate shavings, or a dusting of cocoa powder if desired.