How to Make It
Combine coffee and 1/4 cup milk in a small saucepan over low heat. Add sugar, cocoa, and chocolate to pan; cook over low heat 4 minutes or until chocolate melts, stirring frequently. (Do not simmer.) Stir in peppermint oil. Divide hot coffee mixture among 6 small coffee cups.
Place remaining 1/4 cup milk in a microwave-safe 1-cup container with a lid. Shake vigorously for 1 minute or until milk is frothy and doubled in volume. Remove lid; microwave milk at HIGH for 30 seconds. Top each coffee cup with a dollop of milk froth. Divide any remaining hot milk evenly among cups. Garnish each cup with crushed peppermint, if desired.