When In-N-Out Burger (a fast food chain in the U.S. south west) first opened in 1948, the company provided only a basic menu of burgers, fries and beverages. Instead of a broad menu like its competitors, In-N-Out has become known for its Secret Menu, unadvertised variations on its burgers that are based on customer preferences, such as the popular ‘animal style’: a mustard cooked beef patty with extra spread (thousand island dressing) and grilled onions. French fries can also be has ‘animal style.’ ‘Protein Style,’ introduced in the 1970s, replaces the bun with large leaves of lettuce; while the ‘Flying Dutchman’ is a 2×2 (two burger patties and two slices of cheese) with no bun, no vegetables, and no spread.
The Daily Omnivore 
Leave a comment