Soseolwon is an East Asian-style dessert cafe serving financiers, castella, pudding, coffee, and tea, located between Muakjae Station and Hongje Station in Seodaemun-gu, Seoul. Its signature sulppang castella is baked to order and comes with fresh cream on the side. Seating is divided across the first floor, second floor, and rooftop, with floor seating, table seating, semi-open rooms, and window benches, and delivery orders are also available. Ordering a set brings castella and milk pudding together.