This is one of my quickest fixes for a dinner party dessert. You need just two ingredients and an ordinary drinking glass. It's a hit every time. Scale up the recipe as needed.
Make the espresso. If you don't have an espresso machine, pick up it up from your local coffee shop. You can also make instant espresso, which isn't as good as the real deal, but will do in a pinch.
Put the scoop of ice cream in a small glass. You can chill the glass in advance if you like. Slowly pour the hot espresso over the surface of the ice cream. Garnish with the cookie, if desired.