# Seongsu café for a birthday surprise cake: Notldun - By Nayul (https://superchart.com/en/@tiled-coffee-cup/) - Written Sep 13, 2026 - Local places › Cafés › Seongdong, Seoul - Sponsored: This post was written with support for a visit to the café. - English edition: https://superchart.com/en/@tiled-coffee-cup/seoulsup-birthday-mousse-cake-notledun/ - Also in: [한국어](https://superchart.com/ko/@tiled-coffee-cup/seoulsup-birthday-mousse-cake-notledun/index.md) ## In short Notldun is a dessert café in Seongdong, Seoul, known for elaborate desserts and whole cakes. I reserved the Signature Blanc whole cake for a friend’s birthday surprise and loved its cassis berry, pistachio cream, and white-chocolate mousse layers. Verdict: a beautiful, delicious cake I’d think of again for another birthday. ## Good to know - **Hours**: Daily 11:00–22:30 (last order 22:00) - **Tables**: About 5–6 tables - **Whole-cake pickup**: Advance reservation and prepayment at booking required - **Storage and serving**: An insulated bag is provided; consume within 3 hours, or refrigerate and eat as soon as possible - **Candles**: Six provided; choose silver or gold *as written by the visitor on Sep 13, 2026* ![Notldun Signature Blanc whole cake](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-01-8tjf9-1200.webp) It was recently a friend’s birthday, so I was looking into cakes when I found a dessert café around Seongsu and Seoul Forest that is incredibly famous for desserts. It’s called Notldun (노틀던), and not only were the other desserts lovely, but the whole cakes were so pretty that I ordered one right away. ## Notldun’s location and waiting ![Exterior view of Notldun café](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-02-15o3g-900.webp) ![Notldun exterior with its signature illustration](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-03-146d4-900.webp) Notldun is just a short walk from either Ttukseom Station or Seoul Forest Station. If you know the distinctive Notldun signature illustration, you’ll find it quickly! Both the lower and upper floors look like cafés, but Notldun is upstairs. ![Notldun waiting guide](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-04-plbup-900.webp) Since this place is clearly famous for desserts, there can be a wait, and there is even a waiting guide. But for takeaway, they said you can come straight in and purchase comfortably. ## Inside Notldun before picking up the whole cake ![Inside Notldun café](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-05-1huy8-900.webp) ![Dessert area inside Notldun](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-06-1k4w0-900.webp) ![The back of Notldun café](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-07-6rzh0-900.webp) ![Notldun pâtissier workspace](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-08-er3j2-900.webp) Since we had bought a whole cake, we had reserved it in advance and were taking it away, so we went straight in. The café was packed, so I couldn’t photograph the seating, but it didn’t seem to have loads of tables—maybe five or six. It really felt like a café where desserts are the main event, with such an elegant atmosphere. Above all, it was so fascinating to watch the pâtissiers making desserts right there inside, haha. ## Drinks, baked treats, and elaborate desserts ![Notldun dessert menu](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-09-kzvhm-900.webp) ![Notldun drink and dessert menu](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-10-px759-900.webp) ![Notldun financiers and madeleines](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-11-1baxv-900.webp) ![Elaborate dessert display at Notldun](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-12-zajf3-900.webp) ![Notldun dessert selection](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-13-19yox-900.webp) ![Notldun whole-cake menu](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-14-1koqj-900.webp) Along with a range of drinks, the menu had financiers, madeleines, and lots of incredibly elaborate, beautiful desserts. ## Reserving and packing the Signature Blanc whole cake ![Signature Blanc whole cake being packed](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-15-ho7bx-900.webp) We ordered a whole cake. Because it is made in advance, you absolutely need to visit after making a reservation, and payment is made in advance when booking, so pickup is quick. Before packing it, the staff showed us the actual cake and checked that it was the one we had ordered. Because it is a mousse cake, they prepared it in an insulated bag, but explained that they recommend eating it within three hours. If it will be longer than that, they recommend refrigerating it and eating it as quickly as possible. ![Whole cake in an insulated bag](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-16-fvkmf-900.webp) They also included six pretty candles with the cake. You can choose between silver and gold, and since we chose a white cake, we went with silver! I was secretly preparing it for my friend’s surprise, so the photos are a little dark, but it is much prettier in person,, haha. ![White whole cake for a birthday surprise](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-17-1bgl3-900.webp) ![Blanc cake prepared with candles](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-18-76udc-900.webp) ## The soft Signature Blanc mousse cake The Signature Blanc whole cake takes the shape of Notldun’s brand mark itself. Since it is a mousse cake, it looks firm from the outside, but it is completely soft and fluffy. It looked so pretty even in photos, but the pattern was just as clear in person. More than anything, the lightly powdery texture on the surface felt a little like snow, which was so lovely, haha. ![Blanc cake in Notldun’s brand shape](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-19-e3vqv-900.webp) ![White mousse cake with a powdery texture](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-20-119a8-900.webp) The cake was so pretty that, even though they gave us six candles, we put just one in the center. Because it was such a pure white cake, I was so curious about how it would look in person, and I was a little worried since I had bought it based only on photos—but the more I looked at it, the more I loved how beautiful it was. ![Birthday cake with a silver candle](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-21-hrizl-900.webp) ![Signature Blanc whole cake](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-22-13ylt-900.webp) ![Cake cross-section with cassis berry and pistachio cream](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-23-j9jaa-900.webp) ![Layered mousse cake cross-section](https://img.superchart.com/images/seoulsup-birthday-mousse-cake-notledun/seoulsup-birthday-mousse-cake-notledun-24-1q1r8-900.webp) ## A slice with cassis berry and pistachio cream After singing happy birthday, we cut into the cake to eat it. Since the pâtissiers make the cakes themselves, the layers really were stacked so beautifully. At the center were cassis berries, also called blackcurrants, and pistachio cream. The combination was tangy and nutty, and so delicious. In particular, the little cassis seeds gave a pleasant bite, so the mousse cake was not simply soft and made it fun to enjoy different textures and flavors, haha. The outside was full of white-chocolate mousse, and even though I am definitely not usually someone who likes white chocolate, it was not overly sweet. Its milky, nutty flavor was really delicious too. When you eat the sweet, nutty, soft white-chocolate mousse together with the various ingredients inside, you get tangy and sweet flavors along with all kinds of textures, haha. The pistachio croustillant at the bottom also added the crisp, nutty flavor of a cookie, making it a perfect cake with nothing missing. It is a little pricey, but it is just as beautiful as it is delicious, so I think it will be the first cake that comes to mind when another friend’s birthday rolls around. ## Where it is - Notldun (노틀던) (노틀던) - 1F, 11 Seoulsup 2-gil, Seongdong-gu, Seoul, South Korea (서울특별시 성동구 서울숲2길 11 1층) - 서울특별시 성동구 서울숲2길 11 1층 - 37.5473614, 127.0400154 - Google Maps: https://www.google.com/maps/search/%EB%85%B8%ED%8B%80%EB%8D%98/@37.5473614,127.0400154,17z --- Superchart · https://superchart.com/en/@tiled-coffee-cup/seoulsup-birthday-mousse-cake-notledun/ · https://superchart.com/llms.txt