Originates from Chongqing/Sichuan. Made with slippery sweet-potato-starch noodles (
红薯粉) in a tangy broth of vinegar, chili oil, peanuts, scallions, and pickled mustard. Instant cup versions (
桶装酸辣粉) from brands like
海底捞 and
嗨吃家 drove a nationwide craze on Taobao around 2020.