Two Fisher brand walnut products were voluntarily recalled on Wednesday because of salmonella contamination detected during sampling by the U.S. Food and Drug Administration. John B. Sanfilippo & Son, which makes nuts, dried fruits and mixes under the Fisher and Harvest Valley Orchard brands, recalled the Fishers eight-ounce chopped walnuts and its eight-ounce pecan cookie pieces packaged in plastic bags, according to the Chicago Tribune .