<P> In 1996, The Onion, a satirical newspaper and website, featured an article with the headline "Doritos Celebrates One Millionth Ingredient", lampooning Frito - Lay for the sheer number of ingredients found in Doritos . </P> <P> Concerns have been raised that the oils, flavorings and additives used may be unhealthy . </P> <P> Doritos are sold in many countries worldwide in assorted flavors . They launched nationally in the United States in 1966, with only one flavor: toasted corn . The product proved successful, but additional market research revealed that many consumers outside the Southwest and West considered the chip to be too bland and not spicy enough for what was perceived as a Mexican snack . Frito - Lay therefore developed taco - flavored Doritos, which also became successful after they were introduced nationally in 1967 . National distribution of nacho cheese - flavored Doritos began in 1972, and were also a hit . For a short run in the late 1970s, Sour Cream and Onion flavored Doritos were available, but were discontinued in the early 1980s . A Sesame seed flavored chip was also available for a short time in the late 1970s . In 1986, Cool Ranch Doritos made their debut and also became popular . Cool Ranch Doritos are sold under the name "Cool Original" in the UK and are called "Cool American" elsewhere in Europe, as ranch dressing is less common in those places . </P> <P> In the 1990s, in partnership with parent company PepsiCo's fast food brands, two new flavors of Doritos were introduced, Taco Bell's Taco Supreme (incorporating a "beef" flavoring that was quite different from the original 1960s "Taco" incarnation) and Pizza Hut's Pizza Cravers . After PepsiCo spun off its restaurant division in 1997, the flavors were simply renamed taco and pizza, respectively, with the pizza flavor discontinued in some markets . At around the same time, due to the popularity of Frito - Lay's Tostitos brand the unflavored Toasted Corn was briefly discontinued, then brought back . In 2008, the Taco Bell flavor was temporarily re-released under the "Back by Popular Demand" label along with Four Cheese . </P>

When did cool ranch doritos tacos come out