Hundreds of frozen waffles products sold at Walmart, Target and other major grocery stores in the U.S. are under recall because they could be contaminated with listeria. TreeHouse Foods announced a voluntary recall of more than 500 varieties of frozen waffles on Friday. The Illinois-based manufacturer said that it discovered the issue after routine testing at the facility. The recalled waffles are sold under a variety of names including Walmart’s Great Value, Target’s Good & Gather and private label brands sold by Food Lion, Kroger and Schnucks. It also produces waffles for brands like Kodiak Cakes, Simple Truth and Foodhold.