Unknown Object The ShackBurger, composed of cheese, lettuce, tomato and ShackSauce, and fry samples.[/caption]

Shake Shack is launching its first Texas location on South Lamar Boulevard in the new Lamar Union.

The grand opening takes place May 5 at 11 a.m. after a weekend of allowing only friends and family in the restaurant at 1100 S. Lamar Blvd., Ste. 2100, to prepare employees for opening day. The restaurant started as a hot dog stand in New York but now also offers hamburgers, fries, custard in various forms, beer, wine and even treats for dogs.

"We're so thrilled to be planting roots in Texas, and we couldn't ask for a better home than the cultural and culinary stronghold of Austin," said Randy Garutti, Shake Shack's CEO, in a news release. "We'll be working hard to cultivate a community gathering spot for locals and visitors to kick back with a delicious burger, frozen custard and cold beer."

One burger and two concretes, what Shake Shack calls its dense custard served in a cup, are exclusive to the restaurant's Austin menu. The Lockhart Link Burger features a griddled Kreuz Market jalapeno cheese sausage link paired with the restaurant's antibiotic-free Angus beef burger patty.

The Cold Shot, a concrete named in honor of Stevie Ray Vaughan, is vanilla and chocolate custard with brown sugar caramel sauce, chocolate toffee and malt powder while the Uchi-koncrete is a vanilla custard with Uchi and Uchiko's miso hazelnut blondie and huckleberry jam. Five percent of sales of the Uchi-koncrete will go toward Austin Pets Alive, according to the company.

The restaurant offers both indoor and outdoor seating. While the living moss wall inside pays homage to the restaurant's roots in New York City's Madison Square Garden, the lighting fixtures were inspired by Austin's bats, according to a news release.