https://www.cnet.com/news/making-burger-kings-impossible-whopper/

On the left is the Impossible Whopper we hacked in Impossible's test kitchen. On the right, a traditional Whopper, indistinguishable visually and on the palate.

The patties supplied to Burger King will be based on Impossible's new 2.0 formulation that was announced at CES in January, 2019. Among other upgrades, this formulation holds up better in restaurant environments like hot holding trays or the 6-inch drop at the end of the conveyor that grills the patty for exactly 2 minutes and 35 seconds at 630 degrees.