Half fill shaker with ice, and add all ingredients.
Shake well, for 20-30 seconds
Strain into a chilled coupe glass
Garnish with espresso beans, floated in the center of the glass.
The first time I made the drink, I used 15 yo Glenfarclas (was all I had at the time). Enjoyed the drink, but felt guilty, so I picked up a $30 bottle of Dewar's.