Pour 400 ml milk into a pot. Add 2 tablespoons cocoa powder, ½ teaspoon ground coriander, ½ teaspoon chili powder, and sugar to taste. Stir well to combine. Heat over medium-high heat and bring to a boil for 2-3 minutes, stirring occasionally, until the spices are fully infused.
Optional: Stir in an alcoholic beverage of your choice to taste.