The smash burger trend doesn’t seem to be slowing down anywhere. Especially not in Connecticut. Popping up all over the state, well after big chains like Five Guys and Shake Shack arrived on the scene, are smash burger spots, both independent ones, and micro chains. 7th Street Burger, which operates over 40 locations, just opened in New Haven, with another set to debut in Stamford in November 2026. The New Jersey-based Mashed Burger, a smaller chain that also serves Nashville hot chicken and churros, got into Stamford back in February. Also growing and recently making its entry into the Connecticut market is another Big Apple burger joint is Flat Out Burger, which started slinging crispy-edged, cheesy, saucy burgers at the busy corner of Grasmere Avenue and the Post Road on August 15.