If you stopped in at the University City Shake Shack this summer, you probably stopped for a “concrete,” a.k.a. a blended frozen custard that’s perfect for a hot summer day. If you did, you also may have been tasting a recipe created by a Drexel Dragon.

Emily Lloyd, a culinary arts major in the Center for Hospitality and Sport Management, won Shake Shack’s Drexel student “Design Your Own Shake Shack Concrete” contest with “City of Butter-ly Love,” which mixes vanilla custard with butter cake (a Philly favorite), caramel and brown butter bits.

“This concrete shows a strong connection to Philly, especially with the butter cake,” says Mark Rosati, Shake Shack’s culinary development manager. “It’s very unique. The brown butter bits are a little bit of a foodie choice, with scientific alchemy happening to make those. And then there’s the salted caramel and vanilla, which are very comforting flavors.”

Lloyd’s recipe was chosen out of 15 different options (though another of her recipes finished in third place).

City of Butter-ly Love appeared on the menu for the month of July. A portion of the dessert’s sales benefited the Drexel Food Lab.