I hear that stacked enchiladas are a New Mexico/Arizona thing. Being from Texas, i'm not real sure but, one thing I do know is these are really good. Everytime we went to my great-uncle's house when I was a kid, this is what we had, and as far as I know the sauce for these enchiladas was his own secret recipe. We call it magic sauce, I don't know why but, it fits. Now I also hear that if you go to a New Mexico resturant and order "stacked enchiladas" you will get a fried egg on top. Seeing as how I am not a big fan of eggs, I don't add that but if you want the "real deal" thats what you need to do.