Cascabel chilies, are dried, ripe, round bola (round) mirasol chili pepper variety (part of the highly variable species Capsicum annuum). They’re sometimes called rattle peppers because the seeds rattle easily inside the dried round fruit. They’re a fairly common and popular pepper in Mexican cooking, though they tend not to be as quite well-known/used outside of Mexico. Cascabels are moderately spicy, and fairly comparable to a guajillo or chipotle pepper of the same size. Cascabels are well known for imparting a fruity and distinctive flavour to dishes in which they’re featured.
Cascabels are available whole (as shown in the picture), and ground, though it is difficult to find ground cascabels that have specifically been labeled as such.
Scoville Heat Units