MIAMI — Burger King restaurants is launching the plant-based Impossible Whopper sandwich nationwide this month. Starting Aug. 8, the meat-free burger will be available at 7,000 locations across the country for a limited time, the company said.

Burger King in January unveiled its Impossible Burger 2.0., a new iteration of its burger made with soy protein rather than wheat protein that contains no gluten, animal hormones or antibiotics. In April, the company began testing the Impossible Whopper in St. Louis, becoming the first coast-to-coast quick-service restaurant to serve plant-based meat from Impossible Foods.

The Impossible Whopper features a flame-grilled, plant-based Impossible Burger topped with tomato slices, lettuce, mayonnaise, ketchup, pickles and white onions. Leghemoglobin (“heme”), the burger’s crucial ingredient, provides a bleeding attribute and creates a ground-beef flavor in raw and cooked product.

“Since we first launched our market tests in St. Louis in April, and later in six other markets across the country, we’ve heard great feedback,” said Christopher Finazzo, president of Burger King North America. “(We) know the Impossible Whopper appeals to both current guests who are already big fans of the Whopper sandwich, as well as new guests who are excited about this new option.”

Other restaurant chains featuring the Impossible Burger include Red Robin, White Castle, Little Caesars, Wahlburgers, Unami Burger and Fatburger.

Burger King’s sister company Tim Hortons, another unit of Restaurant Brands International Inc., expanded its plant-based meat offerings to lunch and dinner menus last week after successfully launching Beyond Meat breakfast sandwiches in June. The Canadian coffee chain also recently became the first major fast food restaurant to offer plant-based eggs.