Shake Shack Mokdong is a fast-food restaurant on the first floor of the SBS building in Mokdong, Seoul, serving burgers, fries, and milkshakes. The burgers and fries come out warm, and milkshakes can be ordered alongside them. The store is spacious and not crowded, so seating is usually available and you can eat quietly. The burgers and milkshakes taste good, but the prices are high.