Powdered green tea is made from whole leaf green tea (just ground into a super fine powder), but drinking it is an entirely different process. In addition, green tea powder can be used in all sorts of other culinary applications, such as cakes, smoothies, ice cream, milkshakes, lattes, etc.
To enjoy a traditional powdered green tea beverage, just add 1 teaspoon of green tea powder to 2 to 4 ounces of hot water(180° F (80° C) in a small bowl. Then stir it until a nice head of froth develops. And then enjoy!