What delicacy is named as a savory Mexican crepa filling?

The delicacy named as a savory Mexican crepa filling is huitlacoche.

Huitlacoche, also called corn smut, is a fungus that grows on maize ears. Although it damages the appearance of corn kernels, it is valued in Mexican cuisine for its earthy, mushroom-like flavor and soft texture. It can be cooked into fillings, soups, quesadillas, tamales, and other dishes.

Using huitlacoche in a crêpe illustrates how Mexican crepas combine a French-style format with local ingredients. The thin pancake supplies a neutral wrapper, while the fungus contributes a distinctly regional savory flavor. This is why the item is described as a delicacy rather than simply as a common vegetable filling.

The other choices are plausible Mexican foods, but they are not the specific delicacy identified in the reference. Huitlacoche is also frequently misspelled or translated loosely as “corn fungus”; both terms point to the same culinary ingredient, though “corn smut” is the standard English biological name.