While it may be April Fool's day, it's no joke that the plant-based movement has widely taken over fast food. The latest chain to join the hype train is Burger King, who's teaming up with Impossible Foods to make a meat-free version of their iconic Whopper.

Starting April 1st, Burger King's first test of the Impossible Whopper will be rolling out in St. Louis, Missouri. 59 different locations in the area will offer up the plant-based take on BK's signature burger. The flame grilled Impossible Patty will be served in standard Whopper style, with mayo, lettuce, tomato, white onions, pickles, and ketchup.

The Impossible Whopper will not be vegan by nature, however, since it contains mayonnaise as part of the build. Since the bun is vegan (based on Burger King's website), however, you can get an entirely vegan version simply by removing the mayo.

For those wondering if there's an actual April Fool's joke here, the appearance of the Impossible Whopper is 100% happening. What may be considered a "prank," though, is when those who order one of these burgers get tricked into believing it's actually beef.

There's no current timetable for how long the Impossible Whopper will be around in St. Louis. Hopefully, though, it does well enough to merit a nationwide launch in the near future.