The Expert-Approved Method For Making Iced Matcha Lattes - Tasting Table
Briefly

Making the perfect iced matcha latte is trickier than it sounds; you want to ensure the matcha is properly mixed so you don't get any grainy, clumpy tea and that the latte is cooled to perfection.
When making an iced matcha latte, use my shake method (shake matcha in cold water in a cocktail shaker 30-40 times) which doesn't involve any hot water.
As you agitate the ingredients, little pieces of ice break off into the liquid, causing it to cool a lot faster than pouring your latte over ice.
Shaken cocktails are colder than their stirred counterparts, and a similar principle applies to matcha, leading to a smoother iced drink.
Read at Tasting Table
[
]
[
|
]