Black Opal

• Ice
• 1 1/2 ounces reposado tequila
• 1 1/2 ounces Guinness
• 1/2 ounce tawny Port
• 1/4 ounce Agave nectar mixed with 1/4 ounce water
• Dash of Angostura bitters
• 1 very small pinch of cinnamon mixed with 1 pinch of sugar, for garnish

1. Fill a cocktail shaker with ice.
2. Add all of the remaining ingredients except the garnish and shake well.
3. Strain into a chilled rocks glass and garnish with the cinnamon sugar.

reposado tequila, water, bitters, sugar

Taken from www.foodandwine.com/recipes/black-opal-cocktails-2010 (may not work)