High Quality Content by WIKIPEDIA articles! When In-N-Out Burger first opened in 1948, the company provided only a basic menu of burgers, fries and beverages. The foods they prepared were made on location from fresh ingredients, including their french fries which were sliced and cooked to order. Unlike the other major competitors in the hamburger fast food restaurant business -- Burger King, McDonald`s and Wendy`s -- as the chain grew in the intervening years, it has not added products such as chicken and salads to its menu or changed its preparation methods. Even into the 21st century, the company`s menu still only lists burgers, fries and beverages advertised as being produced on site from fresh ingredients.