1 1/2 oz. reposado tequila

1/2 oz. Crème de Cassis

1/2 oz. fresh lime juice

2–3 oz. ginger beer

Ice cubes

Tools: shaker, strainer, fine strainer

Glass: highball

Garnish: lime wedge and fresh blackberry (optional)

Combine all ingredients, except ginger beer, and shake. Fine-strain into an ice-filled Collins glass, top with ginger beer and garnish.