Break the chocolate into small chunks and put it in the mug. It’s best to use plain chocolate.
Brew the coffee over the chocolate.
Wait a minute or two for the chocolate to begin to melt, and then give it a stir.
Froth the milk using a device of choice. You can pour milk into a French press and pull the plunger up and down until it gets foamy if you don’t own a milk frother. If using a frother that doesn’t warm the milk, heat it in a microwave or on the stove until just before boiling point.