# After-pizza Seongsu café comparing two coffee beans: T Coffee - By Eunjo (https://superchart.com/en/@tiled-counter-ledger/) - Written Sep 21, 2026 - Local places › Cafés › Seongdong, Seoul - Sponsored: This post was written after visiting with support provided by the store. - English edition: https://superchart.com/en/@tiled-counter-ledger/seongsu-underground-cafe-bean-comparison-carrot-cake/ - Also in: [한국어](https://superchart.com/ko/@tiled-counter-ledger/seongsu-underground-cafe-bean-comparison-carrot-cake/index.md) ## In short T Coffee is a quiet basement café at 159 Achasan-ro in Seongsu, Seoul, sharing a street entrance with a pizza restaurant, so it works as an easy second stop after a meal. Two iced americanos were ordered at T Coffee — one with Little Fit beans, one with the T Coffee blend — to compare acidity against body, along with a carrot cake that is not very sweet. Even underground, T Coffee has wide windows and no musty smell, making it a comfortable spot for solo work or a meeting. ## Good to know - **Address**: B1, 159 Achasan-ro, Seongdong-gu, Seoul - **Hours**: Open year-round / Weekdays 09:00–20:00, weekends 11:00–20:00 - **What we ordered**: 2 iced americanos (Little Fit beans, T Coffee blend beans), carrot cake - **Entrance**: Two entrances; go down to B1 through the pizza restaurant's entrance and walk a little further inside *as written by the visitor on Sep 21, 2026* ![Interior view of T Coffee, a basement café in Seongsu](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-01-hmpvn-1200.webp) 📍Seongsu 'T Coffee' store info - Address: 159 Achasan-ro, B1, Seongdong-gu, Seoul - Hours: open daily - Weekdays 09:00 ~ 20:00 - Weekends 11:00 ~ 20:00 I went out for a stroll in Seongsu and had pizza first, then looked right next door — wait, there's a café here?? I walked straight in. ![Entrance area of T Coffee in Seongsu](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-02-10khs-900.webp) Here's my review of 'T Coffee,' a Seongsu café perfect for escaping the busy streets and having a quiet cup of coffee. ## Finding T Coffee in Seongsu — the pizza place entrance is faster T Coffee is on B1 at 159 Achasan-ro, Seongdong-gu, and there are two entrances, but the pizza restaurant's entrance seems faster. Go down to B1 through the pizza place's entrance and just walk a little further in! I ended up visiting both the pizza place and the café without meaning to.. ![Passageway leading down to T Coffee on B1](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-03-196as-900.webp) ![Sign for T Coffee near the pizza restaurant entrance](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-04-1j7ah-900.webp) ![Basement hallway leading further into the café](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-05-3b6xh-900.webp) ## An underground vibe that doesn't feel underground at all Even though T Coffee is on B1, it didn't feel like a basement at all. You know how basement cafés usually come with a bit of stuffy air or a musty smell? Here, the windows are wide and the interior is so well designed and fresh that it almost felt like being at an outdoor café — not a hint of mustiness. They must maintain it really well! ![Seating area at T Coffee with wide windows](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-06-1yvjk-900.webp) ![Well-arranged, fresh café interior](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-07-nzkgf-900.webp) What especially surprised me was how open the counter and the coffee-making area were, right in the center of the café! ![Open counter at the center of the café](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-08-1jcwd-900.webp) ![Open bar showing the coffee-making area](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-09-f9y3d-900.webp) ![Counter area where coffee is being made](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-10-y75bn-900.webp) Watching the coffee being made was fun in itself, and the whole space stayed so clean and tidy that I felt good the entire time I was there. It also seemed like a perfect spot to quietly open a laptop or read a book, so if you're looking for a good café for working or reading, this place fits the bill. ## T Coffee menu and order — two iced americanos, carrot cake 📌Menu📌 ![Menu board at T Coffee in Seongsu](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-11-1ig5u-900.webp) ![Drinks and dessert menu at T Coffee](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-12-j3vqu-900.webp) Since we'd already had pizza for lunch, we went light (?) with iced americanos and one carrot cake haha ![Ordered iced americano and carrot cake](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-13-1jss6-900.webp) Everyone in the group ordered iced americanos, but we each picked a different bean! ![Two iced americanos made with different beans](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-14-10qam-900.webp) ![Two iced americanos on the table](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-15-1dq8z-900.webp) ### Little Fit vs T Coffee blend — the bean flavor difference At T Coffee you can choose your beans for the iced americano. We picked one with 'Little Fit' beans, known for a charming acidity, and one with the 'T Coffee blend,' known for its heavier body. ![Iced americano made with Little Fit beans](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-16-rzek7-900.webp) The flavor difference between the two beans was clear, so it was fun choosing based on personal taste. ![Iced americano made with T Coffee blend beans](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-17-1lhtz-900.webp) It was a flavor that would satisfy both people who love acidic coffee and people who prefer a nutty, heavier cup. ![A slice of carrot cake that isn't too sweet](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-18-irxpq-900.webp) Pairing it with a carrot cake that wasn't too sweet made for the perfect dessert! ## Good for staying alone, good for meetings too 💻 Great for staying quietly alone, and perfect for meetings too! I came here as a second stop with a friend, but the whole café atmosphere is so calm and cozy that it seemed like a great place to come by yourself too. I actually noticed quite a few people who'd come to spend some quiet time alone. ![A seat good for sitting alone at T Coffee](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-19-14i1z-900.webp) ![Calm interior atmosphere of the café](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-20-1g6dt-900.webp) ![Quiet table seating in the basement café](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-21-1oih6-900.webp) Unlike loud, chaotic large cafés, this is a good café for solo visits where you can focus on the coffee flavor in a calm atmosphere, and ![A seat good for conversation at the café](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-22-1i3zz-789.webp) ![Seating and lighting at T Coffee](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-23-8fln6-900.webp) I also thought it's a space where you could have a light chat or an important conversation. It seemed perfect for a weekend spent focusing on something or relaxing, or even as a study hideout! ![A good spot for weekend work at T Coffee](https://img.superchart.com/images/seongsu-underground-cafe-bean-comparison-carrot-cake/seongsu-underground-cafe-bean-comparison-carrot-cake-24-une1g-900.webp) Of course, I was in a great mood having found the perfect second-stop course right next to the pizza place haha If you're heading out for a stroll in Seongsu and looking for a quiet, good-vibe space, be sure to stop by 'T Coffee' ☕ ## Where it is - T Coffee (티 커피) - 159 Achasan-ro, B1, 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 --- Superchart · https://superchart.com/en/@tiled-counter-ledger/seongsu-underground-cafe-bean-comparison-carrot-cake/ · https://superchart.com/llms.txt