Soft-shell tacos
How would a person define "soft taco" in a traditional sense?
Taco
Traditionally, soft-shelled tacos referred to corn tortillas that were cooked to a softer state than a hard taco - usually by grilling or steaming. More recently the term has come to include flour tortilla based tacos mostly from large manufacturers and restaurant chains. In this context, "soft tacos" are tacos made with wheat flour tortillas and filled with the same ingredients as a hard taco.