What is the name of the taco filled with mashed potatoes?

The taco filled with mashed potatoes is called tacos de papas.

These Mexican potato tacos are made by filling corn tortillas with seasoned mashed potatoes, then folding or rolling them before frying until crisp. The soft, savory potato center contrasts with the crunchy tortilla shell, which is why they are also associated with tacos dorados, or “golden tacos.”

Recipes differ by region and household. The filling may be simply mashed potato with salt, or it may include cheese, onion, garlic, chiles, cumin, or chorizo. Vegetarian versions are especially popular during Lent, when some families avoid meat. Toppings often include shredded cabbage or lettuce, onion, radishes, crema, queso fresco, guacamole, and red or green salsa.

The phrase appears in both singular and plural forms: taco de papa means “potato taco,” while tacos de papas means “potato tacos.” That variation does not change the dish. These tacos should also not be confused with tacos filled with sweet potato, corn, or cassava, which use different ingredients and names.