Second-floor coffee shop in Seongsu, Seoul: ube croffle at Biat

Seongsu-dong is a neighborhood where I always find something new whenever I visit, so I'm always happy to come back. From sleek spaces converted from old factories to trendy concept shops, every alley hides something fun to discover. Today, walking around and chatting with a friend I hadn't seen in a while, we were looking for somewhere comfortable to sit and talk. If you're on the hunt for a Seongsu café dessert spot where you can enjoy a cup of coffee and something sweet, this place is worth a look. Here's my honest review of a warm, cozy spot where both body and mind got a recharge.

How to find Biat Seongsu, and where to park

Biat Seongsu is located at 24-45 Achasan-ro 5-gil, Seongdong-gu, Seoul, 2nd floor, down an alley just off the main Seongsu street. For parking, you can use the nearby Seongdong Ansim public parking lot — if you're planning to drive, it's worth checking the location and how to use it beforehand for a smoother trip.

For first-time visitors, since you need to go a bit inward from the main road, finding the entrance felt like a little treasure hunt, which was exciting in itself. Among Seongsu-dong's characteristically low, old buildings, a sleek sign stood out and naturally drew me in. Biat Seongsu has a stylish vibe from the outside, so my steps felt light heading in, and my anticipation was already building before I even opened the door.

Seating and mood at Biat Seongsu: fine alone or with a friend

Inside, Biat Seongsu has a cozy atmosphere with warm lighting and wood-tone interiors. The seats are spaced well apart and the chairs are comfortable, making it great both for chatting with a friend and for quietly reading a book or working on a laptop alone.

The natural wood-grain tables paired with soft lighting gave it the comfortable feel of an old regular haunt. From the window seats, you could take in the view of the Seongsu-dong alley at leisure, while the seats further inside felt cozier and more private, good for focused conversation. The stylish posters on the walls added a nice touch to the space, and every little detail felt thoughtfully placed, which was pleasant to look at throughout. With seats arranged in a variety of styles, there was also the fun of picking a spot to match your mood or purpose that day. Visiting on a quiet weekday afternoon especially meant it wasn't crowded, so we could enjoy the space at ease.

How do the ube injeolmi croffle and pistachio walnut Malenka taste?

What we ordered at Biat Seongsu was the ube injeolmi croffle, the pistachio walnut Malenka cake, and a signature drink. Looking at the menu, I was happy to see a solid lineup of both coffee and caffeine-free drinks, which made it easy for my friend, who's sensitive to caffeine, to find something to order too.

I'd definitely recommend trying the ube injeolmi croffle (purple yam croissant-waffle), the house specialty. The combination of purple ube cream and nutty injeolmi (sweet rice cake) felt unfamiliar yet special, and it was so crispy on the outside and moist inside that the first bite drew an audible "wow" out of me. The croffle kept its signature flaky layers while being baked through without getting soggy, so I enjoyed it down to the last piece. The pistachio walnut Malenka cake stood out for its nutty flavor and soft texture, and pairing it with a strong coffee was the perfect match. It wasn't overly sweet, just a lingering hint of sweetness that was easy to enjoy without feeling heavy. Adding the signature drink alongside brought out the dessert flavors even more. The prices were reasonable too, so it was easy to enjoy a tasty snack without worry, and the portions were just right for sharing with a friend.

A Seongsu-dong café for a break mid-walk

Enjoying tasty snacks in a quiet atmosphere while resting comfortably left me really satisfied. If you're looking for a place to catch your breath and recharge when you're tired from walking around Seongsu-dong, I'd recommend Biat Seongsu. Next time I'm back in Seongsu, I plan to stop by again and try other menu items too.