Huitlacoche, also known as corn smut or Mexican truffle, is a fungus (Ustilago maydis) that grows on corn kernels, turning them into swollen, grayish-black masses. It is considered a delicacy in Mexican cuisine, valued for its earthy, smoky, and slightly sweet flavor, similar to mushrooms or truffles.
Historically, Aztecs and indigenous peoples of Mexico consumed huitlacoche, recognizing its nutritional and culinary value. It is used in tacos, quesadillas, tamales, soups, and sauces, often paired with cheese, epazote, and chilies. Despite being seen as a crop disease in other parts of the world, huitlacoche is intentionally cultivated in Mexico and has gained popularity in gourmet cuisine due to its unique taste and rich umami profile.