Burger King is doubling down on meatless burgers.
The Restaurant Brands International chain announced on Monday plans to launch a vegetarian burger in more than 20 markets across Europe. The Rebel Whopper, made with patties from Unilever-owned The Vegetarian Butcher, will be available in more than 2,400 European locations Tuesday.
Burger King first launched the Rebel Whopper and another meatless sandwich, the Rebel Chicken King, in Sweden earlier this year.
In the United States, the burger chain will test substituting beef patties with Impossible patties in its Whopper Jr. burgers and signature hamburgers. The company said 180 restaurants in Milwaukee, Cedar Rapids, Augusta, Cincinnati and Buffalo will test the extended Impossible burger line.