4 cups whole milk
1 vanilla bean, split lengthwise
10 ounces good-quality white chocolate, chopped
2 1/2 teaspoons brandy
2 1/2 teaspoons vanilla extract
4 cups hot strong fresh-brewed coffee
Unsweetened cocoa powder
1. Pour milk into heavy medium saucepan. Scrape in seeds from vanilla bean; add bean. Bring to boil. Remove from heat. Add white chocolate; whisk until melted and smooth. Whisk in brandy and vanilla extract. Using tongs, remove vanilla bean. Return white chocolate mixture to low heat; whisk until frothy, about 1 minute.
2. Pour hot coffee into mugs. Ladle white chocolate mixture over. Sprinkle with cocoa powder and serve.