Combine all ingredients into your small cocktail shaker without ice, and dry shake (no ice) for 5-7 seconds.
Add ice, and wet shake in the shaker with ice for another 5-7 seconds.
Double strain with a Hawthorne strainer and fine mesh strainer into a rocks glass with ice (Old Fashioned glass-- we used one large-format ice cube).
Garnish with a brandied cherry or your garnish of choice.