01 -
In a small bowl, whisk cornstarch with 60 ml cold milk until smooth and free of lumps.
02 -
In a medium non-stick saucepan, combine remaining whole milk and evaporated milk. Set over medium heat until steaming but not boiling, stirring occasionally.
03 -
Add chopped Mexican chocolate disk, dark brown sugar, and ground cinnamon to the pan. Stir continuously until chocolate and sugar dissolve completely.
04 -
Slowly pour in cornstarch slurry while stirring constantly. Continue to cook over medium-low heat, stirring nonstop, until the mixture thickens and coats the back of a spoon, around 6 to 8 minutes.
05 -
Remove from heat. Pour into mugs and serve hot. Optionally, garnish with a whole cinnamon stick.