Everyone has a favorite kind of burger, and the fast food–style, thin, and suuuper crispy (almost burnt, they're so crusty) is one of the best. To make them at home, the secret is NOT wheeling out the grill. Instead, use a big cast iron pan so you can smash the patties down and make sure they get a perfect caramelized crust. To make sure they don't dry out and get sad inside, make sure to use 75/25 or 80/20 ground beef. Onions cook around the burgers to soak up the flavor and get all nice and tender, and they're so decadent paired with the spicy special sauce (mayo, Dijon, and sambal-oelek chile paste) that you don't even need cheese! I know it sounds wild, but it's true, I swear.