Our Impossible Whopper Sandwich features a savory flame-grilled patty made from plants topped with juicy tomatoes, fresh lettuce, creamy mayonnaise, ketchup, crunchy pickles, and sliced white onions on a soft sesame seed bun. 100% Whopper, 0% Beef. Meal comes in medium and large sizes with a side of piping hot, thick cut French Fries and a fountain drink of your choice to make it a meal. Cooked on the same grill as meat. Alternate cooking method available upon request.