The hottest curry that you could try would be the Phaal Curry. The Phaal curry is considered to be the hottest curry in the entire world and is labelled the hottest Indian curry. The reason the Phaal curry is considered to be the hottest in the world is because it is made with Bhut Jolokia, which is the hottest chili in the world. Phaal curry is actually a British Asian curry which was created in the city, Birmingham.