While tacos these days take many shapes and forms, we know that even these basic chicken tacos are not the most authentic. The taco history is long and rich and is originally a form of Mexican street food. These are a much more Americanized form of taco, meaning that it's a tortilla filled with spiced meats and yummy toppings. While the true definition and origin of a taco can be quite blurry, we know one thing for sure - tacos are our favorite food group.