Gather the ingredients.
In a large stovetop espresso maker, brew coffee according to the manufacturer's instructions.
In a glass measuring cup with at least 2 cup capacity, add the sugar. Once a little bit of coffee has brewed, add about 1 tablespoon of the coffee to the sugar. Reserve a little extra coffee concentrate in a small dish to use if needed. Place the pot back on the stove to finish brewing.
Make the espuma by using a small whisk or spoon to vigorously beat the sugar and espresso until it is a pale brown, almost foamy paste, about 2 to 3 minutes. You cannot beat it too much.
When the coffee has finished brewing, pour it over the espuma while stirring to incorporate. Let the foamy crema rise to the top.
Pour the mixture into individual demitasse cups. Shake the measuring cup a little and use a spoon as you pour to get espuma into each cup.
