In-N-Out became California's first drive-thru hamburger stand when it opened in 1948. While the chain has expanded to other states on the West Coast, it's still regarded as a primarily Californian chain.
It cost me $4.50, which I thought was an excellent deal for the large burger sitting in front of me. One of the first things I noticed was how thick the burger patties were, they were much thicker than other burgers I tried at a similar price point.
Most Double-Double burgers come with lettuce, tomato, onions, and spread. To keep my burger similar to the other burgers I tried, I ordered it with onions, pickles, and spread, which I thought tasted similar to Thousand Island dressing.