Miami-based Burger King began testing the Impossible Whopper in April in St. Louis.
The company also continued to boast its international expansion plans for the Tim Hortons brand, including stores in China.
RBI experienced 87% rise in profits during its second quarter, ended June 30.
Joins McDonald’s, Starbucks and Burger King, among others.
Acquisition will create North America’s third-largest food and beverage company.