In honor of National Double Cheeseburger Day, we are taking a look at the history behind this beloved food. At first, chefs would simply use more meat to form a larger patty for a customer who wanted a little something extra. But when ground beef began to be sold pre-pattied (rather than needing to be formed on-site by the chef), stacking two patties became the easiest way to make a larger burger for customers who requested it. Bob’s Big Boy is credited with serving the first double cheeseburger way back in 1937, but it was In-N-Out that really helped popularize the double cheeseburger after launching their “double double” in 1948. Many restaurants, including McDonald’s, Burger King, and Steak 'n Shake, have debuted their own versions of the double cheeseburger since then. These debuts were met with enthusiasm from customers who quickly realized how delicious the double cheeseburgers were! Today, double cheeseburgers continue to be a popular order anywhere that burgers are served.