In-N-Out Burger stole the hearts of Californians 66 years ago when the first fast food establishment opened in 1948. The quality American cuisine continues to thrive today because In-N-Out offers one promise no other fast food restaurants can commit to. NO PROCESSED FOOD. No frozen, pre-packaged french fries and hamburger patties; In-N-Out cooks their potatoes and 100% beef patties on the spot! A true diamond in the rough for the fast food world. Scroll down for images of one of the famous In-N-Out menu choices!