Macerate the Berries: Place blackberries in a clean glass jar. Lightly mash them with a fork or muddler to release juices. Add the vodka (and lemon zest or vanilla, if using). Seal the jar and let it infuse in a cool, dark place for 1–2 weeks. Shake the jar gently every day or so.

Strain: After infusion, strain the mixture through a fine mesh strainer or cheesecloth to remove solids. You can strain it twice for clarity.

Make a Simple Syrup: Heat the water and sugar in a saucepan until the sugar fully dissolves. Let it cool to room temperature.

Combine: Mix the blackberry-infused alcohol with the cooled syrup. Taste and adjust sweetness if needed.

Bottle: Pour into a sterilized bottle. Let it rest another few days.