A huge recall of over 600 varieties of frozen waffles has been expanded to include another frozen breakfast food, sold at major retailers across the country. Walmart and Target are among the stores that have pulled frozen waffles from their shelves this week after listeria fears prompted a widespread recall.

Check your freezer if you buy frozen waffles or pancakes. Some popular brands have just been recalled due to listeria concerns. Here's what to know

Treehouse Foods, which makes the waffles, is voluntarily recalling some of its products—including select Kodiak Cake, Harris Teeter, and Good & Gather waffles—due to the potential to be contaminated with Listeria monocytogenes.