The Serrano, when growing, is green and then ripens to deep scarlet red in color, but they can also occasionally mature to orange, yellow, or brown in color. When green, the Serrano is sometimes referred to as chili verde. The Serrano chile is tubular in shape, tapers to a point, and measure approximately 1-1/2″ to 2″ long and 1/2″ wide.
The Serrano is considered a medium heat chile and comes in at 8,000- 18,000 SHU. The flavor profile of the savory Serrano is a crisp, smoky, fruity flavor with citrus undertones and a heat that lingers.