How to Make It
Bring milk, cinnamon stick, cocoa, and vanilla to a boil in a medium saucepan over medium-high heat, stirring occasionally. Reduce heat to low; stir in chopped chocolate until melted. Remove from heat. Add chili powder, if desired. Discard cinnamon stick. Garnish, if desired.
Note: We tested with Lindt Excellence Chili Dark Chocolate.