Place candy cane in a plastic bag and use the bottom of a cup, rolling pin, or meat mallet to crush it into small pieces.
In a small saucepan, combine milk and crushed candy cane. Heat milk, whisking occasionally until milk begins to steam.
Remove from heat, stir in chocolate, and continue to stir until chocolate is completely melted and candy cane pieces dissolved.
Add coffee or espresso to a 12-ounce mug. Whisk the milk and chocolate mixture vigorously (or use a milk frother to whisk) until frothy. Pour over coffee. Add sugar to taste.
Top with whipped cream and more crushed candy cane if desired and enjoy!
Notes
*Be sure to use high-quality white chocolate that you enjoy the taste of. I find that cheap chips that I'm happy to eat in cookies are not ideal for flavoring white-chocolate drinks.Approximate nutritional information does not include optional whipped cream and was calculated using 2% milk.