Poblano! Cubanelle peppers are not even in the same league as poblano peppers. However, on the Scoville Scale rating system, Poblano has a rating of 1,000 SHU — that's considered mild! That's because it's only about half as hot as the Jalapeño pepper, which clocks approximately 2,500SHU. On the other hand, Cubanelle pepper has 0-1,000 on the Scoville scale. It's so mild that it sometimes doesn't register on the Scoville.