What is Usu-cha?
In contrary to Koi-cha, Usu-cha is lighter and thinner, much like a cup of drip coffee. Fast whisking is required to create a layer of froth on top. High grade matcha is highly recommended for making Usu-cha. Add sugar/cream or other alternatives to your liking.

What is Koi-cha?
Koi-cha is also called thick tea, just like premium coffee espresso. It’s strong and intense in flavour with an unctuous mouthfeel. Only top grade matcha can be made into Koi-cha. 

Matcha Coldbrew Instruction