Los Tios Mexican Restaurants have been serving Houston authentic Tex-Mex for over four decades. Through those years, devoted diners have made Los Tios a family tradition handed down over generations. Favorite tables, favorite waiters and, most importantly favorite dishes have become rituals with Houstonians who have named Los Tios "Houston’s Best Tex-Mex" time and time again.And why not? Los Tios offers Tex-Mex favorites that include mesquite-grilled fajitas, enchiladas, tacos, nachos, tamales, burritos, quesadillas and our famous puffy shells dripping in creamy chile con queso. So many Houstonians got their first taste of a frozen margarita at Los Tios. And why not? Los Tios introduced Houston's first frozen margaritas back in 1975. Made with top-shelf tequila and fresh squeezed limes, our Margarita is widely known to be Houston's finest.