# Seongsu decaf café for iced americano and mugwort tea: T Coffee

- By Sohyun Ra (https://superchart.com/en/@seochon-two-chopsticks/)
- Written Sep 22, 2026
- Local places › Cafés › Seongdong, Seoul
- Sponsored: This post was written after a complimentary store visit provided in exchange for coverage.
- English edition: https://superchart.com/en/@seochon-two-chopsticks/seongsu-decaf-tea-cafe-t-coffee/
- Also in: [한국어](https://superchart.com/ko/@seochon-two-chopsticks/seongsu-decaf-tea-cafe-t-coffee/index.md)

## In short

T Coffee is a quiet basement café in Seongdong, Seoul, 488 meters from Exit 2 of Seongsu Station at 159 Achasan-ro, basement level 1. From a seat by the floor-to-ceiling window looking out on green trees, T Coffee's lemon shiso mugwort tea costs 6,800 won and the decaf iced americano 6,500 won, and the mugwort tea's soft mix of lemon and shiso was the one to remember. For a Seongsu café where you can talk or work on a laptop without the crowds, T Coffee is the answer.

## Good to know

- **Location**: 159 Achasan-ro, basement level 1, Seongdong-gu, Seoul (488m from Seongsu Station Exit 2)
- **Hours**: Mon–Fri 09:00–20:00, Sat–Sun 11:00–20:00
- **Lemon shiso mugwort tea**: 6,800 won
- **Decaf iced americano**: 6,500 won
- **Menu**: Specialty coffee, americano and latte, a range of teas, baked cookies

*as written by the visitor on Sep 22, 2026*

Sometimes you just want a cozy space to catch your breath in the middle of a busy day, right?

![Main image of T Coffee, a quiet café in Seongsu](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-01-16e7u-1200.webp)

Today I want to introduce a quiet Seongsu café tucked away from the bustle of Seongsu-dong's crowded alleys — T Coffee, a cozy hideaway hidden underground.

## Where is T Coffee and what are its hours?

T Coffee is at 159 Achasan-ro, basement level 1, Seongdong-gu, Seoul, 488 meters from Exit 2 of Seongsu Station. Hours are Mon–Fri 09:00–20:00 and Sat–Sun 11:00–20:00.

It's near Seongsu Station, so it's easy to reach by public transit. It's on the basement level of the building, but—

![Exterior of the building housing T Coffee near Seongsu Station](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-02-cmp0g-900.webp)

![Entrance leading down to T Coffee's basement level](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-03-1zisw-m-900.webp)

![Passage around T Coffee's basement entrance](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-04-1qd98-900.webp)

![T Coffee's front door and signage](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-05-8jhx2-900.webp)

—once you actually go down, you'll wonder "wait, is this really the basement?" because floor-to-ceiling windows open onto green trees and an outdoor scene that greets you.

![Basement seat with a view of green trees through floor-to-ceiling windows](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-06-15eo2-900.webp)

![Outdoor greenery seen through T Coffee's large windows](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-07-jtzfe-m-900.webp)

It's perfect for anyone looking for a laid-back, quiet Seongsu café away from noise and crowds.

![Quiet interior seating at T Coffee](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-08-qmx7f-900.webp)

## Inside T Coffee: wood-tone seating and an open kitchen

Inside, T Coffee is arranged around a central counter with wood-tone tables and bench seating along the walls. Even underground, the big windows keep it from feeling cramped, making it easy to work or chat here.

![Interior of T Coffee with wood-tone tables and chairs](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-09-zctpj-900.webp)

![Interior around T Coffee's central counter](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-10-16pac-900.webp)

The interior centers on a sleek counter surrounded by neatly arranged wood-tone tables and chairs, giving off a warm yet stylish atmosphere.

![T Coffee's stainless steel open kitchen](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-11-1bo1c-900.webp)

![Coffee machine and grinders arranged at the bar](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-12-1bk0e-900.webp)

The open kitchen at the center of the store uses stainless steel up front, giving off a sleek, hygienic, modern feel. Professional coffee machines and grinders are arranged harmoniously, letting you watch the barista's extraction process up close — a real draw for coffee lovers.

![Bench seating along the wall under soft lighting](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-13-keaom-m-900.webp)

![Neatly arranged tableware and cups at T Coffee](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-14-13y67-900.webp)

Long bench seating runs along the wall, tables lit with soft lighting, tableware and cups neatly arranged — the calm the space gives off makes it ideal if you're looking for a Seongsu café to visit alone, read in, or study in. The layout also makes it easy to focus if you open your laptop for light work or study.

## T Coffee's menu: specialty coffee, tea and baked cookies

T Coffee has a solid lineup from deep-flavored specialty coffee to basic drinks like americano and latte. With various teas and sweet baked goods also on offer, it's a great place to enjoy a pleasant dessert time.

![T Coffee's coffee and tea menu board](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-15-1o5e8-m-900.webp)

![Display of baked goods and desserts at T Coffee](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-16-12hll-900.webp)

We ordered the intriguing, unusual tea menu along with a clean decaf coffee.

![Tea and decaf coffee set on the table](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-17-wie5b-719.webp)

![Two ordered drinks on the table](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-18-1sb31-900.webp)

![Drinks and table setting by the window seat](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-19-1vslw-900.webp)

![Close-up of a drink at T Coffee](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-20-1j5j4-900.webp)

### Lemon shiso mugwort tea, 6,800 won

![A cup of T Coffee's lemon shiso mugwort tea](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-21-1nrt1-900.webp)

The name alone stirred up curiosity, and the deep, wholesome flavor of mugwort blended gently with bright lemon and shiso — really appealing. It was a distinctive, comforting tea you don't get to try often.

### Decaf iced americano, 6,500 won

![T Coffee's decaf iced americano](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-22-1tldl-m-900.webp)

It was great that they had a decaf option for late in the day or whenever caffeine feels like too much. The clean, nutty flavor of the beans matched the calm café atmosphere, adding depth to the leisurely time spent sitting there.

## Who is T Coffee best for?

![Wide view of T Coffee's calm basement space](https://img.superchart.com/images/seongsu-decaf-tea-cafe-t-coffee/seongsu-decaf-tea-cafe-t-coffee-23-1lja0-900.webp)

T Coffee was a place that left me in a good mood the whole time I stayed, thanks not just to the tasty drinks and desserts but to the warm atmosphere of the space itself. It's great for calm conversation, making it a fine choice for a Seongsu meeting spot or a café for office workers, and it's just as fitting for a quiet, romantic date with someone special.

If you're looking for a cozy, uncrowded space to spend time in Seongsu-dong, be sure to stop by T Coffee.

## Where it is

- T Coffee (티 커피)
- 159 Achasan-ro, basement level 1, Seongdong-gu, Seoul, South Korea
- 서울특별시 성동구 아차산로 159 지하1층
- 37.5433996, 127.0618187
- Google Maps: https://www.google.com/maps/search/%ED%8B%B0%20%EC%BB%A4%ED%94%BC/@37.5433996,127.0618187,17z

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