The hottest peppers include the Carolina Reaper, the Trinidad Scorpion Moruga and the 7 Pot Primo. The Bhut Jolokia, also known as the ghost pepper, is also extremely hot.
As of 2015, the Carolina Reaper is the hottest pepper in the world. The hottest of these peppers contain 2.2 million Scoville heat units, while most average at about 1.5 million. The 7 Pot Primo has a long, skinny tail and packs about 1.3 million Scoville heat units, while the Trinidad Scorpion Moruga has about 2 million. The popular ghost pepper used to be the world's hottest, clocking in at 1 million Scoville heat units.