Instructions
- In a cocktail shaker, muddle 5 fresh blackberries with 1 ounce of lime juice.
- Add 2 ounces of gin and fill the shaker with ice.
- Shake well until chilled.
- Strain the mixture into a copper mug filled with ice.
- Top with 4 ounces of ginger beer.
- Garnish with a fresh blackberry and a sprig of mint.