Steak 'n Shake has switched to cooking its french fries in beef tallow ... fear about displacement into new opportunity Burger chain says its 'fries will be RFK'd' as it joins 'Make America ...

A Shake Shack tray with a burger, fries, and a shake - Lorenza Marzocchi/Shutterstock ...

Unfortunately for diners with dietary preferences, even a humble french fry can contain ... that makes the fries unsuitable for vegans. But what about Burger King? While BK's fries don't contain ...

Some Florida Steak 'n Shake locations were the first to start cooking their french fries in beef tallow. Now, all locations ...