The Black Opal Cocktail is a drink that was created in the early 1930s by a bartender named Harry Craddock. It is a gin-based cocktail that is made with dry vermouth, orange bitters, and blackberry liqueur.

To make a Black Opal Cocktail, you will need:

– 2 ounces gin

– 1 ounce dry vermouth

– 1 dash orange bitters

– 1 ounce blackberry liqueur

Instructions:

1. Add all ingredients to a shaker filled with ice.

2. Shake well and strain …