01 - Bring water to a boil in a small saucepan. Add tea bags, reduce heat, and simmer for 3–4 minutes. Remove from heat and let steep for 2 additional minutes to develop full flavor.
02 - Remove and discard tea bags. Stir Okinawa brown sugar into hot tea until completely dissolved.
03 - Add milk and stir thoroughly. Return to low heat and warm gently without boiling for 1–2 minutes.
04 - Pour milk tea through a fine-mesh strainer into a heatproof jug to remove any tea residue.
05 - Fill two glasses with ice cubes. Pour warm milk tea over ice, stir gently, and serve immediately.