The last one is my favorite of them all. I can not explain enough how much I love Shake Shack burgers! They are just perfect. The patties is grilled perfectly, the cheese is just wonderful. Shake Shack is an American fast casual restaurant chain based in New York City. But has opened many branches in South Korea and they saw a huge success, especially in Seoul. The first time I went to Shake Shack was in Busan two years ago. I was waiting in huge line to try the burger and it was not disappointing at all. It was totally worth the wait. They have different types of burgers from beef patties, chicken and also mushroom patties if you are a vegetarian. In February they introduce Chick’n bites, it is so delicious. Besides amazing burgers, Shake Shack are also known for their Shakes. Make sure to try them when you visit!