Heralded gourmet burger joint Shake Shack recently blew into the Windy City with a cold blast of unique desserts, featuring signature specialties like the Salted Carame’L’ concrete (dense frozen custard ice cream blended at high speed with mix-ins).

Retail bakeries take note: The Salted Carame’L’ is made with pieces of salted caramel donut from Chicago donut shop Glazed & Infused. Also on the Chicago menu is Da S’mores, made with pieces of Bang Bang Pie s’mores pie. A single concrete at Shake Shack sells for $4.30, a double for $6.55.

In other parts of the country, Shake Shack recently opened in Atlanta’s Buckhead area, where they serve a local-only concrete called the Pecan Pie Oh My, made with vanilla custard and a slice of pecan pie from Atlanta bakery H&F Bread Co.

Now approaching 50 locations, Shake Shack opened its first Chicago location on Nov. 4 in the city’s River North section. It immediately connected with retail bakeries with a name in their city to create “mash-up” frozen desserts that are becoming immediate hits with Shake Shack’s loyal following.

Bang Bang Pie has one retail bakery location in Chicago. Glazed & Infused, voted for serving the city’s best donut in 2014 by Chicago magazine, has six shops in Chicago.

Celebrating its 10th anniversary, Shake Shack sprouted from a hot dog cart in Madison Square Park in Manhattan created by Danny Meyer’s Union Square Hospitality Group (USHG) to support the Madison Square Park Conservancy’s first art installation. The cart was quite the success, with Shack fans lined up daily for three summers.

In 2004, USHG won the bid to open a permanent kiosk in the park, and Shake Shack was born. This modern day “roadside” burger stand serves up the most delicious burgers, hot dogs, frozen custard, shakes, beer, wine and more. An instant neighborhood fixture, Shake Shack welcomed people from all over the city, country and world who gathered together to enjoy fresh, simple, high-quality versions of the classics in a majestic setting.