Dissolve the matcha. Add the matcha and sweetener (if using) to a small bowl or measuring cup (preferably one with a spout) and pour the hot water over it. Use a bamboo whisk to whisk the matcha into the water for about 20-30 seconds, repeating the shape of a “W”, until the powder is completely dissolved and the mixture is slightly foamy.

Combine. Pour the milk into a serving glass and top with lots of ice. Pour the matcha mixture over the milk, and use a straw or long spoon to gently stir the mixture to combined.

Serve. Serve immediately while nice and cold and enjoy!