Severance burger to go: microwaved Mozza Chicken Bites, Bas Burger

In short

Bas Burger Yonsei Cancer Hospital Branch is a handmade burger shop that opened when the B1 floor of Sinchon Severance Hospital in Seodaemun, Seoul, was renovated. While waiting for a younger sibling, the writer ordered a basic Bas Burger and a The Bas Burger set (with an extra patty), but the sibling ran late, so the writer packed the burgers and Mozza Chicken Bites to take home to a husband outside Seoul. Chips are free when eating in, and even as takeaway, Bas Burger earned the verdict 'a taste of Seoul.'

Bas Burger chips and tomato-shaped ketchup

Good to know

Getting there
Sinchon Station Exit 2 · 9-min walk (store listing, Oct 6, 2026)
Location
B1, Sinchon Severance Hospital, 50-1 Yeonse-ro, Seodaemun-gu, Seoul
Hours
11:00–21:00 (last order 20:30)
What we ordered
The Bas Burger set, an extra Bas Burger on its own, Mozza Chicken Bites (takeaway)
Set drink
Sparkling water available
Free sauces
5 free with a set; 2 others cost extra
Swap to grilled onions
Free
Chips
Free when eating in; paid for takeaway
Ketchup and mustard
Unlimited

as written by the visitor on Apr 24, 2026 · not checked with the business

Where is Bas Burger Yonsei Cancer Hospital Branch?

Bas Burger Yonsei Cancer Hospital Branch (바스버거 연세암병원점) is at 50-1 Yeonse-ro, Seodaemun-gu, Seoul, on the B1 floor of Sinchon Severance Hospital. It is open 11:00 to 21:00, with last order at 20:30.

Bas Burger Yonsei Cancer Hospital Branch in the basement of Sinchon Severance Hospital

A burger spot near Yonsei in Sinchon!! Bas Burger!! It's a new burger place that moved in when the B1 floor of Sinchon Severance Hospital was renovated!! It was lunchtime, so there were quite a lot of people inside!!

Inside Bas Burger Yonsei Cancer Hospital Branch crowded at lunchtime

It was lunchtime, so I went into the shop for a burger!! My sister who lives in Seoul was supposed to come, so I went in and waited!! It's Bas Burger, so I figured I had to try the basic Bas Burger!!

Ordering area and menu at Bas Burger Yonsei Cancer Hospital Branch
Bas Burger menu board where the writer chose the basic Bas Burger

Maybe because Severance Hospital staff get a discount, there were quite a lot of hospital employees!! Some were eating in the shop and many were taking food away!!

Bas Burger shop with hospital staff and takeaway customers coming and going
Inside Bas Burger Yonsei Cancer Hospital Branch

What comes free with a Bas Burger set?

At Bas Burger Yonsei Cancer Hospital Branch, a set comes with 5 free sauces, while 2 other sauces cost extra. Swapping the onion for grilled onion was free too.

First I ordered the Bas Burger, which carries the shop's name, and The Bas Burger, which has an extra patty!! I made The Bas Burger a set and added a single Bas Burger!! I picked sparkling water as the drink!! A set gets you free sauces, and a whole 5 of them are free!! Two other sauces cost extra!! You can change the onion to grilled onion, and it's free, which is nice!!

Sauce choices shown when ordering a Bas Burger set
Bas Burger free sauces and grilled onion option notice
Order options at Bas Burger Yonsei Cancer Hospital Branch

Bas Burger chips are free only when eating in

The chips at Bas Burger Yonsei Cancer Hospital Branch are free when you eat in the shop, but you pay if you take them out. Ketchup and mustard are also unlimited.

And the chips are free!! Ketchup and mustard are unlimited too! The chips are free if you eat them in the shop! You have to pay if you take them out!!

Bas Burger chips and sauces, free when eating in

Lunchtime wait and atmosphere at Bas Burger

At lunchtime, the staff warned in advance that group orders might slow things down. In reality the burgers came out quite fast, and the crowd thinned out a lot once the lunch peak passed.

Ordering the burgers and waiting!! They told me it might take a while because of a group order, and since my sister hadn't arrived anyway, I said that was fine and ordered first!!

Seats at Bas Burger while waiting for the burgers after ordering
Bas Burger shop while waiting after the group order notice

Looking around the shop while waiting for my sister!! Lots of people were eating alone, and lots of older customers too!! When I passed by earlier to register at the hospital it was quite crowded~ and it was crowded at the entrance too when I was on the phone with my sister deciding what to eat, but afterwards a lot of people left!!

Inside Bas Burger Yonsei Cancer Hospital Branch after the lunch peak
View of the Bas Burger shop while waiting for the sister

What do Bas Burger chips taste like?

The chips are mild and plain, and the writer thought they'd go well with beer. She dipped them in ketchup, and says they're good with pepper sprinkled on too.

Trying a few chips too!! Hehehe, the chips were really mild and tasty, but eating alone made me so embarrassed that I only ate a few, which I regret!! They taste like they'd go with beer!! I'm having mine with sparkling water!! The Bas Burger tomato ketchup is so cute!! haha I dipped mine in ketchup~ but they say it's good with pepper sprinkled on too!!

Bas Burger chips and tomato-shaped ketchup

How do the basic Bas Burger and The Bas Burger taste?

The basic Bas Burger is thin but packed, with veggies, raw onion, tomato, patty and sauce, while The Bas Burger has two meat patties and is thick. The writer said the bun, veggies and patty combination was great even in the basic Bas Burger alone.

Ha, my sister hadn't even arrived and the burgers came out pretty fast!!

Bas Burger and The Bas Burger set that came out quickly
Burgers from Bas Burger Yonsei Cancer Hospital Branch on the table

Hehehe, I'm waiting to eat together when my sister comes, but why do the burgers look so good!! The veggies inside are so fresh!!

Basic Bas Burger with fresh veggies

The Bas Burger is mine, and The Bas Burger is for my sister, who went to work and is taking a half day to come!! When I called to say the burgers were out and asked where she was~ she said she'd be a bit late and told me to eat first!!

The Bas Burger ordered for the sister
Sparkling water from the Bas Burger set in a steel cup

Still, to wait and eat together, I filled my belly with sparkling water!! The drink came in a steel cup~ and it's really cold!! The sparkling water is so refreshing!! I want this steel cup!! haha

Bas Burger chips eaten bit by bit alone

It would be nice to eat together, but since I was eating alone I nibbled the fries bit by bit!! haha

Comparing the two-patty The Bas Burger with the basic Bas Burger

Ha, the double has two meat patties so it's thick!! The Bas Burger is thin but packed!! Veggies, raw onion, tomato, patty and sauce!! It's just the basic Bas Burger and it's so good!! The sauce is tasty, and the bun, veggies and patty combo is just so good!! It made me think of my husband, who loves burgers!!

Cross-section of the basic Bas Burger after one bite

Ha, I couldn't hold out waiting for my sister and ate!! While eating I noticed the colors are so pretty!! The bun is super moist and soft too!! hehe The sauce is tasty and the combination is so good!! If it were near my home I'd buy it a few more times!!

Is Bas Burger still good as takeaway?

My sister was late and my hospital appointment time was approaching, so the writer hurriedly packed up the half-eaten Bas Burger and ended up taking it to her husband back home outside Seoul. He ate the takeaway burger and said 'everything in Seoul is delicious', and the Mozza Chicken Bites were even better after a microwave reheat.

I wanted to eat with my sister~ but she was much later than expected, and my hospital appointment time came before she arrived, so I hurriedly packed up what I was eating and left!!

Bas Burger packed to go in time for the hospital appointment

When I met my sister and gave her the packed burger, she gave it back and said to take it to my brother-in-law!! I'd ordered Mozza Chicken Bites for my sister too, but I ended up eating them myself!! haha I told my husband I was bringing him a burger and to eat a light dinner, and he was so happy!! After eating the burger, my husband said everything in Seoul is delicious!! hahaha People from the countryside always find everything delicious when they go to Seoul!!

I enjoyed even the cold chips, which my husband calls Gundam-cold~ and we shared the Mozza Chicken Bites too!! There's cheese wrapped in chicken with a batter coating, and I ate them as they were at first and then microwaved them later, and they were really good!! The Seoul taste really is different!!

Where it is

Bas Burger Yonsei Cancer Hospital Branch바스버거 연세암병원점

50-1 Yeonse-ro, Seodaemun-gu, Seoul, South Korea (B1, Sinchon Severance Hospital)서울특별시 서대문구 연세로 50-1 B1 바스버거

Open in Google Maps

Local places · Restaurants