1/3 cup granulated sugar
1/4 cup unsweetened cocoa powder
1/4 teaspoon salt
3 cups milk, divided
3/4 teaspoon vanilla extract
1 cup heavy cream
1 (1 ounce) square bittersweet chocolate
1 (1 ounce) square white chocolate
3/4 cup whipped cream
6 teaspoons mini chocolate chips or shaved bittersweet chocolate
Combine sugar, cocoa, salt and 1/2 cup milk in medium bowl. Beat until smooth.
Pour into slow cooker. Add remaining milk and vanilla extract.
Cover and cook on LOW for 2 hours.
Add cream. Cover and cook on LOW for 10 minutes.
Stir in bittersweet and white chocolates.
Pour hot chocolate into 6 coffee cups. Top each with 2 tablespoons whipped cream and 1 teaspoon chocolate chips.