# Blue Ribbon coffee shop in Seongsu for a signature latte: Iridescent - By Soyun (https://superchart.com/en/@checkered-tablecloth-3/) - Written Sep 18, 2026 - Local places › Cafés › Seongdong, Seoul - Sponsored: This visit was sponsored by the business. - English edition: https://superchart.com/en/@checkered-tablecloth-3/iridescent-seongsu-signature-latte-americano/ - Also in: [한국어](https://superchart.com/ko/@checkered-tablecloth-3/iridescent-seongsu-signature-latte-americano/index.md) ## In short Iridescent is a coffee shop on Seoulsup 4-gil in Seongsu, Seoul, with black-tone interiors, a terrace and a spot in the 2026 Blue Ribbon guide. An americano at Iridescent costs 5,000 won and the signature Iridescent latte costs 6,000 won; the latte turns sweeter, almost like condensed milk, the longer you drink it, while the americano is nutty rather than bitter. Walk in for the mood and stay for the coffee — an easy Seongsu café recommendation. ## Good to know - **Location**: 20-1 Seoulsup 4-gil, 1F, Seongdong-gu, Seoul - **Americano**: 5,000 won - **Signature Iridescent latte**: 6,000 won - **Desserts**: S'mores brookie, pound cake, croissant - **Coffee beans**: Special blend and decaf (you can compare the aromas) - **Seating**: Terrace and indoor seats facing outside - **Also worth knowing**: Listed in the 2026 Blue Ribbon guide; collaboration coupons that change every month - **Price reference**: ₩5,000 ≈ $3.6 · ₩6,000 ≈ $4.3 (2026-09-19) *as written by the visitor on Sep 18, 2026* ![Black-toned exterior with green plants at Iridescent café in Seongsu](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-01-1p9lt-1200.webp) ## What kind of coffee shop is Iridescent on Seoulsup 4-gil in Seongsu? I was just walking around Seongsu when I stopped in my tracks — this café with black tones mixed with green plants caught my eye. Iridescent! It even had a terrace, so I thought, ooh, the vibe here looks good... and walked right in haha ![Entrance view of Iridescent café with its terrace](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-02-1mupz-650.webp) Turns out it's also listed in the 2026 Blue Ribbon guide! I got pulled in by the atmosphere but the coffee was delicious too, so I'm writing this up as a Seongsu café recommendation. ## Iridescent menu and prices ![Menu board at Iridescent café](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-03-an2er-685.webp) *Iridescent's menu* I ordered an americano for ₩5,000 and the signature Iridescent latte for ₩6,000! ![Special blend and decaf beans placed next to the menu board](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-04-oacbz-650.webp) Next to the menu board, they had a special blend and a decaf bean set out so you could smell them before choosing. Nice touch being able to compare the scents haha ![Dessert case with s'more brookies and pound cake](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-05-3hotc-650.webp) I saw s'more brookies, pound cake, and croissants in the dessert case. I only had coffee this time and didn't try them, but if you want dessert alongside your drink, it's worth a look! Actually, the case was empty that day because... they'd knocked all the desserts over while moving them, oops. When I was debating what to get, the owner came right over to my table to explain — you could really tell how much care they put into both the desserts and the coffee! ![Interior space of Iridescent café](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-06-ag25z-650.webp) ![Indoor seating and interior design at Iridescent](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-07-sqwj5-650.webp) ![Window seat at Iridescent café](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-08-qzxen-650.webp) ![View toward the terrace side of Iridescent café](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-09-1amai-650.webp) ## Terrace or indoor seat at Iridescent: where should you sit? Instead of the terrace, I sat indoors at a table with a view outside. The people chatting on the terrace looked so relaxed... I thought, next time I have to sit there too haha Inside there was a big speaker too, and the hip music matched the space really well. A nice spot to rest with a coffee after walking around and shopping in Seongsu! ![Iridescent café displaying its 2026 Blue Ribbon mark](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-10-162pp-650.webp) *Iridescent, a 2026 Blue Ribbon winner...!* The coffee came out not long after I ordered haha. That crema is killer 💖 Now that I'm older... I just can't go to bad cafés anymore, nope nope~~ ## The collaboration coupon that changes every month ![Collaboration coupon given with the coffee](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-11-1pbso-650.webp) Huh, what's this... some kind of coupon?? Apparently the collab coupon changes every month!! ![Jansport 10% discount coupon received at Iridescent](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-12-1ulvx-650.webp) They also gave us a 10% discount coupon for Jansport haha. Looked handy for shopping around Seoul Forest (but we'd already done our running shoe shopping at Good Runner... so, pass!!) ![Signature Iridescent latte placed on the table](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-13-1goim-650.webp) ## How does the signature Iridescent latte taste? First I tried the Iridescent latte! The first sip wasn't too sweet — you could taste the coffee's bitterness along with the milk. They said it's a base made by mixing several kinds of milk, soy milk, oat latte, etc., with espresso added... ![Close-up of a cup of Iridescent latte](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-14-1n5jf-650.webp) But the more I drank, the sweeter the milky coffee flavor seemed to get?! There was a sweetness reminiscent of condensed milk, so it satisfied both my caffeine craving and a not-too-sweet sweetness at the same time! Lately I can't even finish a Mega Coffee choco frappe anymore... just the right amount of sweet is the way to go~~~ ![Drinking the signature Iridescent latte](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-15-1j3kw-650.webp) Rather than tasting the same from start to finish, it was fun watching the flavor shift little by little! A cup that made choosing the signature worth it ♥ Honestly, my boyfriend (Choco) ordered it... and I kept stealing sips lol (sorry~) ![Two cups: Iridescent latte and americano](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-16-l4g5b-650.webp) ## The americano at Iridescent: nutty, not bitter That day I really needed an americano transfusion, so I ordered one lol. Not bitter at all, just nutty — perfect for a caffeine refill! haha ![Iridescent americano with visible crema](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-17-1j2qu-650.webp) The crema was still alive too, so it was delicious! Ahh~~~ this place really knows coffee ~~~ For anyone who can't stand mediocre café coffee anymore... if you spot this place while walking around Seongsu, come on in ♥ ![Looking out the window at Iridescent while drinking coffee](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-18-l0zu3-650.webp) Drawn in by the vibe, but won over by the coffee too — that's Iridescent. ![Final shot of coffee cups on the table at Iridescent](https://img.superchart.com/images/iridescent-seongsu-signature-latte-americano/iridescent-seongsu-signature-latte-americano-19-1x78g-650.webp) The sweetness that built up sip by sip in the latte, and the nuttiness of the americano — both stayed with me. If I'm recommending Seongsu cafés, this one goes on the list too haha. Next time I'll have to try the terrace seats ♥ See you again, Seongsu~~~ ## Where it is - Iridescent (이리데센트) - 20-1 1F Seoulsup 4-gil, Seongdong-gu, Seoul, South Korea - 서울특별시 성동구 서울숲4길 20-1 1층 - 37.5471519, 127.0431758 - Google Maps: https://www.google.com/maps/search/%EC%9D%B4%EB%A6%AC%EB%8D%B0%EC%84%BC%ED%8A%B8/@37.5471519,127.0431758,17z --- Superchart · https://superchart.com/en/@checkered-tablecloth-3/iridescent-seongsu-signature-latte-americano/ · https://superchart.com/llms.txt