In a sturdy glass or small mixing bowl, toss in your ½ cup blackberries and 10 mint leaves. Grab a spoon (or muddler if you’re fancy) and mash it all together gently. Get the juices flowing and release the mint oils. Tip: If your blackberries are extra tart, add a little more agave syrup in the next step. Juice both of your limes and pour that liquid sunshine right over the muddled berries and mint. Add 1 tablespoon of agave syrup and give everything a little swirl.
That citrusy zing plus the sweet berry-mint combo? Absolute mocktail magic.
Fill your glass with ice cubes, as much or as little as you like. Then top everything off with 1 cup of sparkling water. Pour slowly and watch the bubbles dance through the berries. Give it a gentle stir to combine.
Pop in a slice of lime and a few whole blackberries for garnish.