"小绿茶" in Engpsh is "Matcha", it is a type of powdered green tea which is originated from Japan. It is often used in Japanese tea ceremonies and also used in various food and beverage items such as matcha latte, matcha ice cream, and matcha cakes.
Here are some Engpsh sentences with its Chinese translation:
I love having a cup of Matcha in the morning. (我喜欢早上喝一杯抹茶。)
Have you tried the Matcha flavored macarons? (你试过抹茶味的马卡龙了吗？)
The Matcha powder gives the smoothie a unique flavor. (抹茶粉使这种冰沙有独特的味道。)