In-N-Out has a limited menu consisting of only three different sandwiches: the hamburger, cheeseburger, and "Double-Double" (double meat/double cheese). French fries and fountain drinks are available, as well as three flavors of milkshakes. The hamburgers come with lettuce, tomato, with or without onions (the customer is asked upon ordering, and may have them fresh or grilled), and a sauce, which is called "spread," and is similar to Thousand Island dressing with a mayonnaise base.
There are, however, additional named items that are not on the menu, but are available at every In-N-Out. These variations reside on the chain's "secret menu," though the menu is accessible on the company's web site.[28] These variations include 3x3 (which has three patties and three slices of cheese), 4x4 (like the 3x3 but with four patties and slices of cheese), Neapolitan shakes, grilled cheese sandwich, and Animal Style, a house specialty that the company has trademarked because of its association with the chain. An Animal Style fry comes with melted cheese, spread, and grilled onions on top. By adding patties at an additional cost, one could conceivably create a burger of any size; 100x100 burgers have even been ordered before.[29]