In a medium bowl, beat the cream until soft peaks just start to form. Add the confectioners' sugar and beat to soft peaks. Set aside.

In a pot or heatproof pitcher, combine the coffee, sugar, and liqueurs, and stir until the sugar is dissolved. Divide among 4 stemmed mugs and top with the whipped cream. Sprinkle the cream lightly with cocoa powder, and serve immediately with a straw in each mug.