Hongdae Diary Cake: Yourday’s Signature Dessert Near Sangsu

If you are browsing Hongdae dessert cafes with a soft spot for cute, custom-feeling sweets, Yourday’s diary cake is the focused name to know. The Sangsu-Hongdae area cafe has presented its “diary cake” as a signature cake through its official Instagram account, with the relevant post shown as published around June 13, 2026. ¹

The appeal is easy to understand from the available details: this is not just a generic slice of cake, but a dessert positioned around a distinctive diary-like concept, connected to lettering options and reservation-style ordering. For readers planning a dessert stop in the Hongdae area, the most useful facts are straightforward: the cafe is listed near Sangsu, the cake appears as a signature item, and the price and shop information are available through cafe listing pages. ²

Hongdae Diary Cake at Yourday

홍대 다이어리 케이크 Yourday Seoul dessert cafe trend

Yourday is identified on its official Instagram presence as “유어데이ㅣ상수 홍대 카페•레터링 케이크,” which places the cafe in the Sangsu and Hongdae dessert map while also highlighting lettering cakes as part of its identity. ¹ That matters because the diary cake is not being described only by outside platforms; the cafe’s own social post introduces it as a signature cake, giving the item a clearer role within the shop’s menu.

Another official update adds an important detail for anyone thinking of the diary cake as a gift or celebration dessert: Yourday announced that lettering became available for the diary cake. The same post summary notes reservation guidance through Naver Reservation, which connects the item to a made-to-order or pre-arranged cake flow rather than a purely walk-in dessert decision. ³

That does not mean every ordering detail is available from the provided material. The source information does not specify exact customization limits, required lead time, flavor options, or whether same-day pickup is possible. So the safest takeaway is simple: lettering availability is confirmed, and reservations are referenced, but any specific wording, schedule, or pickup conditions should be checked through Yourday’s active reservation or official contact channel before ordering.

Why This Cake Is Getting Attention

A May 9, 2026 post from Yourday’s official Threads account mentioned the diary cake alongside the Eton mess menu, framing the diary cake as a dessert drawing more attention than other menu items in a store update. ⁴ That gives the cake a little more context: it is not only a listed product, but one that the cafe itself has pointed to in relation to customer interest.

The available cafe listing descriptions also reinforce the cake’s role. One store page classifies Yourday as a dessert cafe in Mapo-gu’s Sangsu-dong area and describes dessert time with the cute signature diary cake. The same listing shows the menu item “다이어리케이크시그니처” at 14,000 won. ⁵ Dukplace also lists “다이어리케이크시그니처” at 14,000 won, matching that price information and helping make the basic cost easier to verify. ⁶

For anyone comparing Hongdae dessert cafes, this is the kind of detail that helps narrow the choice. Some cafes are mainly about coffee, some about plated desserts, and some about cakes designed for photos, small celebrations, or personal messages. Yourday’s diary cake sits in that latter space based on the available information: a signature dessert, connected to a lettering cake identity, with an official notice that lettering is possible.

The name also does a lot of work. A diary cake suggests something personal and keepsake-like, which fits naturally with lettering. The source material does not provide a full product description, ingredient list, or design breakdown, so it would be going too far to describe the exact look or taste beyond what is stated. Still, the repeated positioning across official and listing sources is enough to understand why the cake is being treated as the specific angle for this cafe.

Location, Hours, and Planning Notes

Yourday’s KakaoTalk Channel lists the address as 1F, 49-11 Wausan-ro 13-gil, Mapo-gu, Seoul, and the channel search result introduces it as a Sangsu Station cafe selling diary cake. ² Dukplace gives the same location as Seoul, Mapo-gu, Wausan-ro 13-gil 49-11, 1F, and lists the operating hours as daily from 12:00 to 20:00. ⁶

Those details make the cafe especially relevant for people moving between Sangsu and Hongdae. Hongdae is often used loosely by visitors to describe the broader cafe-and-shopping zone around Hongik University, while Sangsu is close enough to be part of the same dessert-hopping route. The source records specifically support Sangsu-Hongdae positioning, so it is fair to frame Yourday as a Hongdae-area dessert cafe rather than a generic Seoul cake shop.

A practical planning note: because lettering and Naver Reservation are mentioned in the official source summary, the diary cake sounds like something you may want to arrange in advance when it is for a birthday, date, friend gift, or small celebration. ³ However, the provided material does not confirm whether reservations are mandatory for every diary cake order. If you are planning around a fixed time, the official KakaoTalk Channel or reservation page would be the sensible place to confirm availability.

Hongdae Diary Cake Yourday near Sangsu cafe guide

In short, Yourday’s diary cake is a focused dessert pick for readers looking beyond broad lists of Hongdae dessert cafes. The strongest source-backed picture is clear: Yourday is a Sangsu-Hongdae cafe, the diary cake is presented as a signature item, lettering has been announced as available, and the listed signature diary cake price is 14,000 won.