Cosmos Burger Carlsbad occupies a counter inside the Windmill Food Hall on Palomar Airport Road, bringing the North County gourmet-burger concept's full menu to Carlsbad from its original Oceanside location at 208 North Coast Highway. Six-ounce hand-formed patties are served on brioche buns with proprietary Cosmos sauce, and the lineup includes a truffle-aioli burger, a house-made BBQ version with applewood bacon, and a serrano-jam option — sitting alongside quick-service seafood from Hooked on Poke & Sushi in the neighboring Bressi Ranch corridor. A cauliflower-fried patty built with herb aioli, pickled onions, and Cheddar fills the vegetarian slot, while the smash-burger slider format layers a three-ounce Cosmos patty with cheese sauce, pickle mix, and caramelized onions. The Windmill Food Hall location offers craft beer and wine pairings that extend the menu into evening service, complementing the craft-brewery density on nearby Avenida Encinas where Burgeon Beer Company pours rotating IPAs. Each six-ounce patty is formed from fresh-ground beef, seared on a flat-top griddle at high heat to develop a Maillard crust, and finished with sauce and toppings in under four minutes from order to tray.