In a small saucepan over medium heat, combine milk, coffee, pumpkin, and spices. Cook stirring constantly until just simmering. Remove from heat and add chocolate ( reserve some chocolate for garnish). Just before serving, top each mug with whipped cream, a few shavings of white chocolate, and a sprinkle of pumpkin pie spice or cinnamon. Feel free to add your favorite spirit to make it a Drunken Pumpkin!