Mondelez Global, the manufacturer of Ritz Crackers products, has announced a voluntary recall of some varieties, due to concerns over salmonella. Mondelez said the supplier of whey powder for its crackers recalled the ingredient because of the possible presence of the bacteria. The recall affects Ritz Bits Cheese, Ritz Cheese Cracker Sandwiches, Ritz Bacon Cracker Sandwiches with Cheese, Ritz Whole Wheat Cracker Sandwiches with White Cheddar Cheese, Ritz Everything Cracker Sandwiches with Cream Cheese, and Mixed Cookie, with expiration dates from Jan.