4 ounces very strong coffee or espresso, at room temperature
4 ounces Licor 43
Ice
For each cocktail, combine 2 ounces coffee, 2 ounces Licor 43 and a handful of ice in a cocktail shaker or jar with a tight-fitting lid. Shake vigorously until very cold and frothy, about 1 minute. Pour into a rocks glass and repeat for a second cocktail.