The secret menu.
wikipedia,
In-N-Out’s website acknowledges the existence of its secret menu, listing the following six choices while noting that these are just “some of the most popular items on our not-so-secret menu.”[3]
Double Meat - “Two 100% pure beef patties, hand-leafed lettuce, tomato, spread, with or without onions, stacked high on a freshly baked bun.”[3]
3 x 3 - “Three 100% pure beef patties, hand-leafed lettuce, tomato, spread, three slices of American cheese, with or without onions, stacked high on a freshly baked bun.”[3]
4 x 4 - “Four 100% pure beef patties, hand-leafed lettuce, tomato, spread, Four slices of American cheese, with or without onions, stacked high on a freshly baked bun.”[3]
Grilled Cheese - “Two slices of melted American cheese, hand-leafed lettuce, tomato, spread, with or without onions on a freshly baked bun.”[3]
Protein Style - “Your favorite burger wrapped in hand-leafed lettuce, instead of a bun.”[3]
Animal Style - “Burger of your choice with hand-leafed lettuce, tomato, a mustard cooked beef patty; add pickle, extra spread, with grilled onions.”[3]
This is their website secret menu.
http://www.in-n-out.com/secretmenu.asp
Yep I’ve settled on the 3 X 3 with animal fries...I always felt the double could use a bit more and I would seriously bust a gut on a 4 X 4!..:oP
you can also ask for and get an Arnold Palmer -1/2 ice tea-1/2 lemonade.