# Seongsu café for cinnamon grapefruit granita: Iridescent - By Chaerin (https://superchart.com/en/@seoul-coffee-stroll/) - Written Sep 10, 2026 - Local places › Cafés › Seongdong, Seoul - Sponsored: This visit was sponsored by the business. - English edition: https://superchart.com/en/@seoul-coffee-stroll/seongsu-iridescent-cinnamon-granita/ - Also in: [한국어](https://superchart.com/ko/@seoul-coffee-stroll/seongsu-iridescent-cinnamon-granita/index.md) ## In short Iridescent is a calm, polished café near Seoul Forest in Seongdong, Seoul. I tried the cinnamon grapefruit granita, a well-balanced Americano, and a fig s’more brookie, then lingered in its comfortable seating. Verdict: choose the granita and brookie if you love tart flavors. ## Good to know - **Address**: 20-1 Seoulsup 4-gil, Seongdong-gu, Seoul, South Korea (서울 성동구 서울숲4길 20-1 1층) - **Hours**: Mon–Sun 10:00–22:00 - **Parking**: Use public parking around Seoul Forest - **Subway access**: 5 minutes on foot from Ttukseom Station Exit 8 or Seoul Forest Station Exit 5 - **Cinnamon grapefruit granita**: ₩8,500 - **Americano**: ₩5,000 - **S’more brookie**: ₩9,500 - **Coffee customizations**: Decaf swap or extra shot ₩1,000 each; milk choice ₩1,200; vanilla syrup ₩1,000 *as written by the visitor on Sep 10, 2026* ## A calm space at Iridescent near Seoul Forest I visited Iridescent, where you can enjoy refreshing cinnamon granita and coffee. It is a café that has built a reputation through word of mouth for its neat interior and coffee, and the modern, calmly ordered space felt pleasant the moment I walked in. The tables were comfortably arranged with plenty of room between seats, making it nice for an unhurried stay. ![Pleasant interior space at Iridescent café](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-01-13or6-900.webp) The address is 20-1 Seoulsup 4-gil, Seongdong-gu, Seoul, on the first floor, and it is open Monday through Sunday from 10:00 to 22:00. For parking, use public parking around Seoul Forest. Birthday perks, vegan options, takeout, Wi-Fi, and group visits are also available. ### Walking from Ttukseom and Seoul Forest stations Iridescent, a Seoul Forest café, was so easy to reach! Personally, I recommend visiting by subway. It is a five-minute walk from Ttukseom Station Exit 8 or Seoul Forest Station Exit 5; from the Seongsu-dong Galbi Alley intersection, walk 100 m toward Hoho Sikdang and you will spot the black ground-floor building~ ![Exterior of Iridescent near Seoul Forest](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-02-793tc-900.webp) ![Outside view of Iridescent café in Seongsu-dong](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-03-1bxod-656.webp) The interior is so neat that “sophisticated” is the word that comes to mind for Iridescent. ![Sophisticated, neat interior at Iridescent](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-04-jujld-900.webp) ![Calm, orderly café seating area](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-05-eov7f-900.webp) It is pet-friendly, so it seems like a great place to bring a dog friend. When I visited, there was an insanely cute Pomeranian, and I petted that little friend a hundred times in my heart haha. Seating for guests with pets is limited, so I recommend asking the staff. ![Pet-friendly café interior](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-06-jtmwt-900.webp) ![Pet-friendly seating at Iridescent](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-07-1g9op-900.webp) Iridescent was clearly a place whose flavors had been recognized: not only by magazines such as the November Bar & Dining magazine, but also on social media and even by the Blue Ribbon survey. ![Magazines and information displays at Iridescent](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-08-1u9tw-900.webp) ![Blankets and water provided at the café](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-09-t5za8-900.webp) There were blankets and water, too. ## Iridescent’s menu and desserts Here is the menu. ![Iridescent drink menu](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-10-46a4y-905.webp) ![Iridescent café menu selection](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-11-blepw-1280.webp) Their signature item is probably the citrus perilla-leaf smoothie, but I ordered other items because I wanted to introduce a range of menu choices. ![Citrus perilla-leaf smoothie at Iridescent](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-12-5lzvv-900.webp) ![Iridescent dessert menu information](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-13-hr5gj-900.webp) There is also a wide variety of desserts, including croissants, pound cake, and s’more brookies, so I recommend ordering one alongside your drink! ### The coffee and desserts I ordered Here is what I ordered. ![The coffee and desserts ordered](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-14-1pbs9-900.webp) ![Coffee and dessert plating at Iridescent](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-15-nvg0y-1200.webp) They say you enjoy food once with your eyes and once with your mouth. The plating was so pretty that I was already satisfied just looking at it. ![Beautifully plated drinks and desserts](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-16-133cf-900.webp) ![A full spread of Iridescent desserts and drinks](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-17-qmlb8-900.webp) ### How refreshing is the cinnamon grapefruit granita? The cinnamon grapefruit granita (₩8,500) is a fruit sorbet combining cinnamon’s sweet aroma with grapefruit’s tartness. Since it was hot, I was drawn to something refreshing. Cinnamon and grapefruit? I was a little doubtful about that pairing, but the cinnamon was not as strong as I expected, so it was bright and refreshing without any heavy, dusty finish! A huge recommendation for people who love sour flavors; if you do not, choose something else. ![Cinnamon grapefruit granita](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-18-u7rh0-900.webp) ### A beautifully balanced Americano The Americano (₩5,000) had perfect balance—not overly bitter or acidic. Coffee customizations include a decaf swap for ₩1,000, an extra shot (two shots are standard) for ₩1,000, a milk choice (Oatside or Maeil soy milk) for ₩1,200, and vanilla syrup for ₩1,000! ![Americano at Iridescent](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-19-ia2f0-900.webp) ![Customizable Americano coffee](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-20-13vlq-900.webp) ### S’more brookie with figs The s’more brookie (₩9,500) came generously topped with ice cream and seasonal figs. Maybe because it is a “s’more” brookie, it was perfectly chewy on the outside and soft within. It was so chewy that it would barely cut with a fork. ![S’more brookie topped with ice cream and figs](https://img.superchart.com/images/seongsu-iridescent-cinnamon-granita/seongsu-iridescent-cinnamon-granita-21-g1s16-900.webp) You can enjoy it three ways: plain, with ice cream on top, or together with fig like a three-part harmony. Figs can sometimes be watery and flavorless, but these were so sweet that the figs alone were absolutely delicious. > My picks are the cinnamon grapefruit granita (because I love sour flavors so much) and the s’more brookie! ## A café for a quiet stay in Seongsu Iridescent served coffee with a fine balance of acidity and nuttiness, and the desserts we ordered alongside it were reliably delicious, too. Its overall atmosphere is clean and uncluttered, making it a good space for a quiet conversation or reading a book. The café also gets lovely natural light, so photos tend to come out nicely. I recommend Iridescent to anyone looking nearby for good-quality coffee and comfortable seating, or for a neat neighborhood café that is not overly hectic. ## Where it is - Iridescent (이리데센트) (이리데센트) - 20-1 Seoulsup 4-gil, Seongdong-gu, Seoul, South Korea (서울 성동구 서울숲4길 20-1 1층) - 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/@seoul-coffee-stroll/seongsu-iridescent-cinnamon-granita/ · https://superchart.com/llms.txt