Seongsu Jiaeng Seoulsup Branch is a cafe in Seoulsup that sells coffee, bakery items, and cakes. It offers matcha latte, mint latte, and a handmade real chocolate brownie, with the mint latte limited to 80 cups per day. The second-floor group seating is reservation-only for parties of 4 to 10, and the fourth-floor workshop and party room is reservation-only for parties of 8 to 25. A decaf cold brew latte is also on the menu.