Guajillo chilies are a type of dried chili pepper commonly used in Mexican cuisine. They are known for their deep red color and mild to medium heat, typically ranging from 2,500 to 5,000 Scoville Heat Units. Guajillo chilies have a slightly sweet and tangy flavor, making them a popular choice for salsas, sauces, and marinades. These chilies are often used in traditional dishes like mole and adobo. To prepare them, they are usually rehydrated in hot water before being blended into a paste or added directly to recipes. Guajillo chilies are a staple ingredient that adds depth and richness to various culinary creations.