How hot are those peppers? Now you can find out, with a list of the 20 hottest chile peppers, a brief description of each pepper and where they rank in Scoville heat units (SHU) up to the Moruga Scorpion, rating an incredible 2,009,231 SHU (about 400 times hotter than the Jalapeño). For a more comprehensive list (over 100 peppers), please purchase the premium version of this app.