are serrano peppers very hot?
The level of heat of a chile pepper is measured in Scoville Heat Units or SHU. On the Scoville scale, Serrano peppers have 10,000 to 20,000 SHU. Serranos are far from the hottest peppers on the planet (the Carolina Reaper ranks first at 1,400,000 SHU) but the serrano pepper is still a hot chile. ... Bell pepper: 0 SHU.