01 - Bring 2 cups of water to a rolling boil. Add the tea bags or loose-leaf tea and steep for 5 minutes. Remove the bags or strain out the leaves and set the brewed tea aside to cool completely.
02 - Prepare the quick-cook tapioca pearls following the package directions. Once cooked, drain and rinse under cold running water to halt further cooking. Set aside.
03 - In a small saucepan, combine the blueberries, sugar, 2 tablespoons of water, and lemon juice. Set over medium heat and simmer for 5–7 minutes, stirring gently, until the berries burst and the mixture thickens. Mash the berries with a spoon, then press the mixture through a fine-mesh strainer to yield a smooth syrup. Allow to cool.
04 - Divide the cooked tapioca pearls evenly between two tall glasses. Fill each glass with ice cubes.
05 - Pour 2–3 tablespoons of the blueberry syrup into each glass. Divide the cooled tea evenly between the two glasses, then pour half of the cold milk into each. Stir gently to combine all layers.
06 - Taste and add honey or your preferred sweetener if desired. Serve immediately with a wide boba straw.