| Ingredient | Quantity |
|---|---|
| Espresso | 1.5 oz |
| Coffee bitters | 2 dashes |
| Lemon juice | 0.75 oz |
| Simple syrup | 0.5 oz |
| Egg white | 1 (optional) |
| Add a splash of orange juice for a citrusy kick |
| Use whiskey instead of simple syrup for a richer flavor |
| Garnish with grated nutmeg for a warming aroma |