CAUTION WORLD'S NO #3 HOTTEST PEPPER The ghost pepper, also known as bhut jolokia, is extremely hot. The ghost pepper measures a whopping 1,041,427 SHU! In the world of peppers, this hotness is measured based on the Scoville scale. The more Scoville heat units (SHU) that pepper has, the spicier it is. For example, the bell pepper has zero SHU, while jalapeño and chipotle peppers measure 10,000 SHU each.