In-N-Out Burger products

The foods it prepared were made on-site from fresh ingredients, including its french fries which were sliced and cooked to order.

Unlike other major competitors in the hamburger fast food restaurant business (Burger King, Carl's Jr., Jack in the Box, McDonald's, and Wendy's), as the chain has expanded over the years, it has not added products such as chicken or salads to its menu since 1976 and has never changed its preparation methods.

The company utilizes a vertical integration model for its raw ingredients, procuring and manufacturing much of its food supplies in-house.

The standard style of burger includes tomato, hand-leafed lettuce and "spread", a sauce similar to Thousand Island dressing.

With its expansion into Texas, the restaurant opened its first production plant outside of California in a suburb of Dallas in order to increase its geographic footprint.

Additionally, several groups of consumer advocacy NGOs, led by CalPIRG, had been pressuring a number of restaurant chains to stop using meat raised with low-dose antibiotics.

In addition to the standard toppings burgers in that range include mustard fried on each meat patty, pickles, grilled onions, and extra spread.

However, on 31 October 2004 a group of friends ordered a 100×100 from a location in Las Vegas posting photos on the web of the burger with Tony Hsieh CEO of Zappos.