The Mustard Carolina Reaper is a rare strain of the Carolina Reaper pepper, which is currently the hottest pepper in the world, according to Guinness World Records. In November 2013, the Guinness Book of World Records named the Carolina Reaper as the new hottest pepper in the world, replacing the Trinidad Moruga Scorpion. The Carolina Reaper pepper averages 1,569,300 Scoville Heat Units (SHU) and some peppers have been tested over 2,200,000 SHU, and it is believed that the Mustard Carolina Reaper is slightly less spicy than the original Carolina Reaper, but its fruity, sweet flavor is very similar. As its name indicates, the Mustard Carolina Reaper starts off green and ripens to a golden yellow, mustard-like color. Unlike the original Carolina Reaper, the Mustard Carolina Reaper has smooth skin, but some pods will have rough, bumpy skin.