Pour the milk and half and half into a small saucepan. Heat on medium-low heat, just until bubbles form around the edges of the pan. Don't let the milk come to a boil!

Immediately turn the heat off, then add the chopped white chocolate. Stir until the chocolate is melted, then pour in the vanilla extract and RumChata.

Serve with a big dollop of whipped cream, some mini marshmallows, and a sprinkle of ground cinnamon.