Fill jar with milk. Cover tightly with lid and shake vigorously for 15 seconds.

Remove lid and microwave the jar for 30 seconds.

Pour coffee into coffee cups, and drop one Lindt Truffle into each cup, stirring until melted.

Using a spoon, block the foam from the jar and pour warm milk into each coffee. Top with foam.

Finish the drink off with a dollop of whipped cream and a sprinkle of cocoa powder, if desired.