Tacos crossed into the United States in the early 20th century with Mexican migrants who worked in railroads, agriculture and mining. In places like San Antonio, women called Chili Queens sold Mexican food in public plazas and helped introduce many Americans to Mexican food from across the border.
That history matters because it shows tacos were part of everyday life long before giant restaurant brands got involved.
But the American taco also changed fast. Tex Mex cooking in Texas, New Mexico, and other border regions adapted the taco to local tastes. Ground beef, tomato, cheddar cheese, and sour cream became common fillings and toppings. Fast food chains pushed the shift even further.
In the late 1940s, Mexican restaurateurs filed patent applications for U shape frying methods for taco shells, and patents were granted in the early 1950s; Glen Bell later helped popularize that crispy taco format through Taco Bell. The hard shell taco, with its rigid taco shells and seasoned ground beef, is real food history, but it is better understood as an American invention.
That is why the soft taco versus crispy taco debate can get confusing. In traditional Mexican restaurants, soft tortillas, especially corn tortilla rounds, remain the default. In many U.S. fast food chains, the hard shell taco became the iconic image.
Neither version erased the other. Instead, they created parallel taco traditions: authentic Mexican food on one side, mass-market Tex Mex on the other and lots of overlap in between.
You can see that evolution in the range of tacos people eat now. A street taco might hold flank steak or carne asada with onion and cilantro. A home-style taco may feature beef or pork cooked low and slow like carnitas. A Baja-style taco may use fish tacos or shrimp tacos with crema. A suburban fast-food taco may arrive in a crisp U-shaped shell with lettuce, tomato, cheddar cheese, and sour cream.
Same basic dish, very different history.
We created this article in conjunction with AI technology, then made sure it was fact-checked and edited by a HowStuffWorks editor.