01 - In a small saucepan over medium heat, whisk together milk, cocoa powder, sugar, and chocolate chips until chocolate is melted and mixture is smooth and steaming. Avoid boiling.
02 - Remove from heat and stir in peppermint extract thoroughly.
03 - Prepare two shots of espresso or strongly brewed coffee.
04 - Divide the espresso evenly between two mugs, then pour the hot peppermint-chocolate milk mixture over each and stir gently.
05 - Top each serving with whipped cream and garnish with crushed peppermint candies or chocolate shavings as desired. Serve immediately.