What is "patbingsu"

Patbingsu (팥빙수, also stylized as patbingsoo, literally red beans with ice) (with variant spellings including bingsu and bingsoo) is a Korean shaved ice dessert with sweet toppings such as chopped fruit, condensed milk, fruit syrup, and Azuki beans. The snack is highly popular in Korea.

The food originally began as ice shavings with red bean paste (known as pat, 팥). It was traded among government officials. Many varieties of patbingsu exists in contemporary culture.