This taco combines some of San Antonio's best flavors - here's how to get it FacebookTwitterEmail The Jerk Shack's testing out new menu items for its second location.Courtesy of The Jerk Shack It's hard to consider The Jerk Shack an underdog at this point. The wee spot, that's quite literally a shack, opened in San Antonio's West Side in 2018 has been lauded by several national sites and newspapers, and even won over local hearts. So when they unleash a new menu item, the city's collective head snaps to attention. That's what they did last week with the drop of their new — hold on to something because this is a mouthful — jerk-n-mac birria taco.