Burger King, owned by Restaurant Brands International (QSR - Get Report) , announced that it will be testing its new, plant-based version of the Whopper sandwich in St. Louis restaurants. 

The vegetarian "Impossible Whopper" will be available at 59 exclusive Burger King restaurants in the St. Louis area and will feature all of the same trappings of a regular Whopper, minus the all-beef patty. 

The offering makes Burger King the first coast-to-coast fast food restaurant to serve the plant-based "meat" from food startup Impossible Foods. 

Impossible Foods announced last year that it will begin selling its "bleeding" burgers in grocery starts starting in 2019. The company's burgers are also now available in about 5,000 restaurants in all 50 states. 

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