Add the two espresso shots or strongly brewed coffee into your serving cup. Add the powdered sugar, if using, and stir to dissolve.
1/4 cup espresso shots or strong black coffee, 1-2 tablespoons powdered sugar
In a medium chilled bowl, whip the cream until it forms stiff peaks. Use an electric mixer to make it easier, but a whisk and some elbow grease work just as well. Add a little powdered sugar to this if you want it sweet.
1/4 cup heavy cream
Add the whipped cream to your piping bag with a star tip and pipe swirls on your espresso. You want a 1:1 ratio of whipped cream to coffee. Add more or less depending on what you like.
Dust with cocoa powder or shaved chocolate if you'd like and enjoy!