In-N-Out's 'Animal Style' off-menu item

In-N-Out Burger's widely known off-menu item 'Animal Style' modifies a cheeseburger by cooking the patty with mustard, adding extra spread, pickles, and grilled onions; fries can also be ordered 'Animal Style' topped with cheese, grilled onions, and spread. 'Animal Style' is part of In-N-Out's informal 'secret menu' that customers commonly request but historically was not printed on standard menus. The chain's San Francisco restaurant follows the same preparation and serves customers who order 'Animal Style' at its Fisherman's Wharf location.