Burger sets with pollock roe mayo near Yonsei University: Bas Burger

In short

Bas Burger Yonsei Cancer Hospital Branch is a handmade burger restaurant on basement level 1 of Severance Yonsei Cancer Hospital, right beside the main gate of Yonsei University in Seodaemun, Seoul. The Bas Burger set and the chicken burger set came with free chips and free myeongnan mayo (pollock roe mayo) and Bas Burger house sauce, and the sauces with the freshly fried potatoes were the highlight. Picking up the free sauces when you order a set at Bas Burger is the key move.

Trays with the Bas Burger set and chicken burger set

Good to know

Location
Basement level 1 of Severance Yonsei Cancer Hospital, right next to the main gate of Yonsei University
How to get there
Go through the revolving door next to Starbucks, then immediately to the right
Potato chips
Free for dine-in customers, 2,500 won with takeout orders
Morning menu
Morning burger and hot soup from opening until 10:30 a.m.
Free sauces
5 kinds with a set or fried item: Bas Burger house sauce, myeongnan mayo (pollock roe mayo), BBQ, ranch, honey mustard
Paid sauces
Kkwari gochu (shishito pepper) red mayo dip, truffle mayo dip
Ordering
Kiosk (1 outside, 2 inside)
Ordered
Bas Burger set, chicken burger set
Price reference
₩2,500 ≈ $1.8 (2026-09-19)

as written by the visitor on Sep 18, 2026

Burger set table setting at Bas Burger Yonsei Cancer Hospital Branch

I'm Mimi, an office worker in Sinchon. Today I went to Bas Burger Yonsei Cancer Hospital Branch, a Sinchon-area burger restaurant near Yonsei University.

Where is Bas Burger Yonsei Cancer Hospital Branch and how do you find it?

This Sinchon favorite is on the basement level of Severance Hospital's Yonsei Cancer Hospital, though from outside it feels like ground level. Let me show you the easy way to get there.

Go in through this revolving door circled in red next to Starbucks —

Revolving door entrance sign next to Starbucks at Yonsei Cancer Hospital

and it's right there on your right as soon as you walk in.

The location is amazing. It's right beside Yonsei University's main gate and near the front of Severance Hospital, so it's an easy walk from pretty much anywhere. A delicious handmade burger spot in Sinchon!

Exterior of Bas Burger Yonsei Cancer Hospital Branch

Inside Bas Burger Yonsei Cancer Hospital Branch: seating and space

Inside it has that classic foreign-style burger joint feel, with two-person tables,

Two-person table inside Bas Burger

and tables you can push together for a bigger group.

Seating at Bas Burger that can fit a larger group

The space is spacious with plenty of tables — really nice.

Bas Burger menu, morning menu hours and kiosk ordering

This is Bas Burger, a delicious burger spot in Sinchon.

Bas Burger menu board with burgers and sides

They have all kinds of burgers, sides, drinks, and a morning menu that's great for breakfast. From opening until 10:30 AM you can get a morning burger with warm soup.

Bas Burger morning menu sign

You order at a kiosk — there's one outside,

Outdoor ordering kiosk at Bas Burger

and two more inside.

Free chips self-bar and the 5 free sauces at Bas Burger

Now for my favorite part of Bas Burger!!

Chips self-bar in the center of the Bas Burger dining hall

There are chips set up right in the middle of the dining hall,

Free chips provided to dine-in customers

and dine-in customers can eat them for free. Free, and genuinely delicious — I kept going back for more. Takeout customers pay ₩2,500.

Chips self-bar sign with takeout pricing shown

The chips are kept warm on a heated warmer,

Warm chips kept heated on a warmer

and there's ketchup, mustard, and even pepper set up right next to them. Sprinkle on some pepper — it's even better!!

Ketchup, mustard, and pepper set out at the self-bar

And one more thing! If you go to the counter, customers who order a set or anything fried get 5 kinds of free sauce!

  • Free sauces: Bas Burger house sauce, jeotgal mayo (seasoned pollock roe mayo), BBQ, ranch, honey mustard
  • Paid: kkwari gochu (shishito pepper) red mayo dip, truffle mayo dip
Sign for Bas Burger's 5 free sauces

I ordered a set, so I grabbed two extra sauces — the Bas Burger jeotgal mayo and the Bas Burger sauce!

How do the Bas Burger set and chicken burger set taste?

Since I was at Bas Burger, I went with the most classic and best menu item — the Bas Burger set — while my husband ordered the chicken burger set.

Jeotgal mayo and Bas Burger sauce grabbed at the counter

We ordered, got a buzzer, and while snacking on chips, our delicious burgers arrived — ta-da!

Trays with the Bas Burger set and chicken burger set

Tasty burger, fries, and a drink — great value for a set menu.

Set menu tray with burger, fries, and drink

My husband's chicken burger had a thick, crispy chicken patty that was delicious, and the vegetables inside were fresh.

Chicken burger with a thick chicken patty

And here's my Bas Burger.

Cross-section of the classic Bas Burger

A solid, well-made classic burger. The tasty sauce combined with fresh vegetables, tangy tomato, and good onions for great flavor.

Inside of the Bas Burger with tomato and onion

Pollock roe mayo (myeongnan mayo) with the fries: the best pairing

Then I squeezed out the sauces I'd grabbed earlier onto the tray —

Free sauces squeezed out onto a tray

and ate them with the fries — the sauce is seriously, seriously special and delicious.

Fries dipped into the sauce

You really, really need to grab these sauces for the full experience. The jeotgal mayo sauce was so, so good!

Jeotgal mayo sauce with fries
Freshly fried Bas Burger fries

Maybe because they're fried in clean oil, the fries had a clean color and tasted great too.

That was my review of Bas Burger Yonsei Cancer Hospital Branch, a great meal in Sinchon.

Where it is

Bas Burger Yonsei Cancer Hospital Branch바스버거 연세암병원점

50-1 Yonsei-ro, B1, Bas Burger, Seodaemun-gu, Seoul, South Korea서울특별시 서대문구 연세로 50-1 B1 바스버거

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