We purposely set out to find tortillas better than those at Phoenix legend Carolina's, ate our way across town, and ended up about 40 pounds heavier. What did we glean from our efforts? That Carolina's still has the best tortillas this side of the Mexican border, tortillas so exquisite that they only need a little butter when grilled to melt in your mouth like savory cotton candy. Of course, they're equally delicioso wrapped around green chile, machaca with egg, chorizo with potatoes, or any of Carolina's variations on a theme. Carolina's has been doing what it does best since 1968, recently opening a second location -- Carolina's Mexican Food North, on Cactus Road. It's instructive to visit the no-frills Mohave Street location, set in one of the rougher-looking neighborhoods in town, and watch the businessmen in Mercedes-Benzes and homeless men on foot stop by for a bite to eat. That doesn't happen anywhere else in the PHX, and it's all because of Carolina's magnificent tortillas.