Step 1

In a cocktail shaker or a jug, muddle the fresh blackberries and mint leaves together until they release their juices and aromas.

Step 2

Cut one lime in half and squeeze the juice, make sure to remove any seeds that may fall in.

Step 3

Add the agave syrup and give it a good stir to combine all the ingredients.

Step 4

Fill a glass with ice cubes and pour the blackberry and mint mixture over the ice.

Step 5

Top the glass with sparkling water, leaving some space at the top for garnish.

Step 6

Stir gently to mix the flavours together.

Step 7

Drop a few extra blackberries into the glass for added flavor and visual appeal.

Step 8

Give the mocktail a final stir and serve immediately.

Step 9

Optionally, you can garnish the glass with a sprig of fresh mint or a lime wedge on the rim.