TreeHouse Foods issued a voluntary recall last week for its frozen waffle products that are sold at many retailers in the U.S. and Canada.

The recall from TreeHouse Foods of frozen waffle products sold in stores throughout the United States has broadened due to concerns over listeria contamination. The new recall includes all of the company’s griddle products, including pancakes and Belgian waffles.

Two listeria-related recalls for frozen waffles and pre-packaged meat products have been issued in recent weeks.