The theme is available on Wednesdays from 5pm for £5.99/£6.49 and customers can choose from beef or Quorn chilli, vegetable jambalaya, BBQ pork & beans, and chicken & vegetable fajitas, as well as jalapeños, guacamole and salsa.
Brewers Fayre made the UK’s largest tortilla chip in celebration of the new offer.
Other themed buffet nights at the brand include chicken shack on Saturdays, Chinese on Mondays and curry on Thursdays.