Onion Seongsu 어니언 성수
Onion Seongsu (어니언 성수) is a bakery café spot in Seongsu-dong, Seoul, open since 2019. Verified open against Seoul's official business registry on 2026-07-20.
- What
- Bakery Café — Pandoro
- Where
- Seongsu-dong, Seongdong
- Price
- ₩₩ · ₩15,000–40,000 per person
- Wait
- Expect lines
- Getting in
- Walk-in
Onion's Seongsu location, set inside a converted warehouse, is one of the neighborhood's defining bakery-cafes — search interest around it runs consistently high even as Seongsu's cafe scene has grown crowded with newer openings. The bread counter draws regular waits, and brand collaborations have drawn pre-opening lines.
Order this
- Pandoro
- Onion bagel
- Croffle
Know before you go
- Address
- 8 Achasan-ro 9-gil, 1-2F, Seongdong-gu, Seoul (Seongsu-dong)
성동구 아차산로9길 8, 1,2층 (성수동2가) — show this to your taxi driver - Hours
- 08:00-22:00 (Sat-Sun from 09:00), last order 21:30, open daily
- Wait
- A converted-warehouse bakery-cafe that remains one of Seongsu's most consistently busy stops years after opening; blog reports describe regular bread-counter waits and, during collaboration pop-ups, lines forming before opening.
- Getting in
- Walk-in · Expect lines
Sources
Good to know
Do I need a reservation at Onion Seongsu?
No — it's a walk-in spot. No reservation system — walk-in only; bread sells out on busy days.
How long is the wait at Onion Seongsu?
A converted-warehouse bakery-cafe that remains one of Seongsu's most consistently busy stops years after opening; blog reports describe regular bread-counter waits and, during collaboration pop-ups, lines forming before opening.
How much does Onion Seongsu cost per person?
₩15,000–40,000 per person.
Keep exploring
Nearby: Haengbokhan Sikdang · Soba Sikdang · Daelim Changgo Gallery · Somunnan Seongsu Gamjatang
More bakery café: Namusairo · Manufact Coffee Roasters · Tori Bakery · Tui Tui Cookie
Verified open against Seoul's public registry (서울특별시 공공데이터).