The main ingredient in a traditional Mexican mole sauce is chocolate, specifically unsweetened chocolate or cacao. Mole is a rich, complex sauce that often includes a variety of ingredients such as chilies, spices, nuts, and seeds, making it a unique blend of flavors. It can be served with different types of meat, most notably poultry, as it complements the dish's richness. There are several types of mole, with the most famous being mole poblano, which incorporates a blend of ingredients that provides depth and a slight sweetness balanced with the heat from the chilies.