Pour blueberry-infused gin, lemon juice, simple syrup, and maraschino liqueur into a Boston shaker. Add a scoop of ice; cover and shake until chilled, about 15 seconds. Add ice; cover and shake ...

Using a fine mesh sieve and rubber spatula, strain the syrup into a large bowl, and press down on the solids to release any extra juices. Discard the solids. Pour the blueberry simple syrup into a ...