Step 1

In a cocktail shaker or a tall glass, muddle blackberries and rosemary.

Step 2

Add sweetener and ice, shake until well combined. (If you do not have a cocktail shaker, simply pour back and forth between two glasses until combined.)

Step 3

Strain mixture over ice and add ginger beer and a squeeze of lime to taste.

Step 4

Garnish with blackberries and a sprig of rosemary.

Step 5

Enjoy!