Guajillo is a type of dried chili pepper commonly used in Mexican cuisine. It is known for its deep red color and mild to medium heat, typically ranging from 2,500 to 5,000 Scoville Heat Units. The flavor profile of guajillo is rich and slightly fruity, with hints of berry and tea, making it a popular choice for salsas, sauces, and marinades. These peppers are often rehydrated before use, allowing them to release their full flavor. Guajillo is a key ingredient in traditional dishes like mole and adobo, contributing to the complex taste that characterizes many Mexican recipes.