1. Cook the tapioca pearls: Bring 2 cups of water to a boil in a saucepan. Add the tapioca pearls and cook for 5-7 minutes or until they float to the top. Drain and rinse under cold water.
2. Brew the tea: In a teapot, add the black tea leaves and pour 1 cup of hot water over them. Let it steep for 5 minutes, then strain the tea leaves.
3. Assemble the drink: In a glass, add the cooked tapioca pearls. Pour in the brewed tea, followed by the milk. Stir in the sugar to taste.
4. Serve: Add ice if desired and serve immediately.