Hot Dark Chocolate

In 2-quart saucepan, heat milk to simmering over medium heat. With wire whisk, stir in cocoa, sugar, chocolate, and vanilla. Heat mixture 3 minutes or until chocolate melts, stirring occasionally. Pour into warm mugs to serve. Mexican Hot Chocolate: Prepare Hot Dark Chocolate as above, but add 1 cinnamon stick (3 inches long) to milk in step 1. Coffee-Spiked Hot Chocolate: Prepare Hot Dark Chocolate as above, but stir 1/4 cup coffee-flavored liqueur into chocolate mixture just before serving.