A petition has seen an influx of signatures since Burger King started testing its plant-based Whopper. Time

Burger King’s Impossible Whopper soon won’t be quite so impossible to find.

Four weeks for the plant-based burger, the fast-food chain announced Monday it intends “to quickly test in additional markets with the intention of nationwide distribution by end of year.”

“The Impossible Whopper test in St. Louis went exceedingly well and as a result there are plans to extend testing into additional markets in the very near future,” the company said in a statement. “Burger King restaurants in St. Louis are showing encouraging results and Impossible Whopper sales are complementing traditional Whopper purchases.”