This dairy-free take on a classic compromises nothing in taste and can be made with any soy, rice, or nut milk.
Bring milk and cinnamon sticks to a boil over medium heat. Reduce heat, and simmer gently for 10 minutes. Remove cinnamon sticks, rinse, and reserve.
Whisk in cocoa, chocolate, sugar, and salt, whisking vigorously until mixture is foamy, 1 to 2 minutes. Divide among mugs. Garnish with cinnamon sticks.