Billionbox

Billionbox is a slider hamburger shop on Gyeongnidan-gil in Itaewon-dong, Yongsan-gu, Seoul, a 13-minute walk from Exit 1 of Noksapyeong Station. The animal sauce tastes similar to nacho cheese and is served alongside the burgers and fries. Choosing a double patty over a single gives a fuller texture and flavor. Because the burgers are mini-sandwich size, eating two or more is needed for a filling meal.