Mole in Dallas?
Okay, so I guess it seems bizarre for a Dallas resident to be jealous of the Mexican food in Utah(!), but I've been working in Salt Lake, and after 3 visits to the Red Iguana, I'm becoming addicted to mole sauces.
Any suggestions for where to go for these back home? Which places in the DFW area do the best moles?
The chicken enchiladas with mole at Cantina Laredo is about the only thing I enjoy at that restaurant.
No restaurant in Dallas has as wide a selection of moles as the Red Iguana. Sad.
The most common one around here--often listed on menus simply as "mole"--is mole poblano. And, in almost every case, it's made from one of a few commonly available jarred bases. (No one's in the back room grinding spices.)
In addition to the recommendations you've received from Donnie and Matt, Nuevo Leon has several moles: mole verde, manchamanteles, and poblano, as I recall, though they may have one or two others. Unfortunately, their Oak Lawn location, which always did a better job with the moles, has closed. The Greenville location seems to be driven more by the bar than by the restaurant. Still, it's worth a try.
Beyond that, your best bet is just to explore the non-gringo-oriented Mexican restaurants and taquerias in your area. None of them is likely to have a menu with a standing array of moles. But many of them will have one or two on the menu, plus an occasional special (such as the chicken in mole colorado pictured below, from Barbacoa Estilo Hidalgo, on Maple).
Though DFW has a large Mexican-American population, most of the immigration has been from the central plains (and, particularly, from Guanajuato), where moles aren't as big as they are farther south (e.g., Puebla and Oaxaca). That may, in part, account for the shortage of options.
Good luck. If you come across anything good, let us know.
Can't help ya with Dallas mole, but I wanted to recommend the "PUNTAS DE FILETE A LA NORTENA" listed under Red Iguana Signature Dishes on the menu. Try that before you leave Salt Lake City if you get a chance. Red Iguana is my favorite place to eat in SLC. Love their moles.