Step 1

Combine the milk, cocoa powder, and sugar in a large saucepan. Cook over medium heat, whisking until the sugar is dissolved and the cocoa powder is thoroughly combined.

Step 2

Heat the milk mixture until it's hot and there are just a couple of small bubbles on the surface (don't let it come to a simmer). Remove the pan from the heat and add the chopped chocolate. Let it sit for about 2 minutes.

Step 3

Whisk the chocolate into the milk until it's smooth and creamy. Add the vanilla extract, cinnamon, and salt. Stir until the hot chocolate is thoroughly combined.

Step 4

Ladle the hot chocolate into 4 mugs. Top with marshmallows or whipped cream and enjoy!