The Blackbird

A riff on a theme which splits the difference between a Martini and a Sour.

1 1/2 oz brandy

1 oz dry vermouth

1/2 oz blackberry syrup

1/2 oz lemon juice

3 dashes orange bitters

3 dashes cinnamon tincture

Shake and strain into a chilled cocktail glass and garnish with a blackberry, either frozen or on a cocktail pick.