Guajillo peppers, also known as “chile guajillo,” are a popular type of chili pepper used in Mexican cuisine. These dried peppers are known for their mildly fruity and tangy flavor, as well as their vibrant red color. Heat Level: Guajillo peppers typically have a moderate heat level compared to other chili peppers, but their spiciness can vary depending on factors like growing conditions and individual peppers. On the Scoville Heat Scale, which measures the spiciness of chili peppers, guajillo peppers typically fall in the range of 2,500 to 5,000 Scoville Heat Units (SHU).