Any sandwich currently available as a 6-inch sub will be offered on the flatbread, Wilson said. In addition, he said, the chain will add Chicken Florentine and Steak & Bacon Melt flatbread sandwiches.

The chicken melts from Costco have devotees across the country, including mother-daughter food duo Meg and Maddie, known as @floridamomof3 on TikTok. These sandwich pockets, made with flatbread, ...