Straight out of Seoul, South Korea, Cafe Bora is yet another sign that Siam's going head over heels for purple sweet potato. 

The compact cafe is all about photogenic purple sweets ("bora" means purple in Korean) made from the trending veggie such as bingsu (sweet potato ice flakes with sweet potato puree served with a cup of sweet potato chips and candied walnut, B195), silky and smooth ice cream (B119), tiramisu (B175) and a particularly delicious purple sweet potato latte (B119). 

They've also got a Bangkok-only selection of green tea treats. Do note: You can expect a queue.