1The recipe for In-N-Out’s special sauce hasn’t changed since 1948.
Irfan Khan//Getty ImagesOne key ingredient in any In-N-Out burger is the chain’s special sauce. Many have tried to copy the secret recipe, which hasn’t changed since the restaurant opened in 1948.
2In-N-Out was California’s first drive-thru hamburger restaurant.
Justin Sullivan//Getty ImagesFounded by Harry and Esther Snyder in Baldwin Park, California, in 1948, In-N-Out Burger became the state’s first drive-thru hamburger stand. The original location measured only ten feet wide, and while Harry ran the restaurant, Esther performed accounting duties from the couple’s home.
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3The original In-N-Out hamburger cost $0.25.
Tommaso Boddi//Getty ImagesThe only major changes to the menu since the restaurant opened have been to the prices. A hamburger cost $0.25, a cheeseburger cost $0.30, and french fries cost only $0.15.
4In-N-Out Burger didn’t begin selling fountain beverages until 1958.
Pool//Getty ImagesTen years after opening its first location, In-N-Out Burger traded bottled drinks for fountain drinks, like Pepsi Cola and Hires Root Beer. At that time, a fountain soda cost a mere $0.10.
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5Celebrity chef Gordon Ramsay is a big fan.
FOX//Getty ImagesEven the most refined palate can appreciate In-N-Out Burger’s deliciousness. World-renowned chef Gordon Ramsay has been known to delight in a Double Double from time to time, and he even goes back for seconds.
6Kylie Jenner ate In-N-Out at least once a week during her first pregnancy.
Tommaso Boddi//Getty ImagesWhile pregnant with her daughter and eldest child, Stormi, Kylie Jenner satisfied cravings with In-N-Out at least once per week.
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7In-N-Out was the first chain to implement a two-way speaker system for drive-thru orders.
Justin Sullivan//Getty ImagesIn 1948, Harry Snyder invented the two-way speaker system in his home garage, an innovation that would later be used by every drive-thru in the country.
8The yellow arrow wasn’t included in the In-N-Out logo until 1954.
FREDERIC J. BROWN//Getty ImagesToday, In-N-Out’s yellow arrow is an iconic element of the chain’s logo, but it wasn’t until six years after the first location opened that it was included in the design of the sign.
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9In 2010, In-N-Out sponsored drag racer Melanie Troxel.
Icon Sports Wire//Getty ImagesThe chain has long been associated with drag racing. Harry Snyder invested 50 percent of the cost to open a track in Irwindale, CA, in 1965, so it only makes sense that his legacy lives on through a 2010 sponsorship of Melanie Troxel.
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