Utz Quality Foods has initiated a voluntary recall of select varieties of Zapp's and Dirty brand potato chips due to concerns over potential salmonella contamination. The issue arises from a seasoning containing dry milk powder sourced from California Dairies Inc., supplied by a third party. Although the affected seasoning batches tested negative for salmonella before use, the company is recalling the products as a precautionary measure based on the ingredient supplier's recall. Utz has confirmed that no other products from their line are affected and has not received any reports of illnesses linked to the recalled chips. Consumers who possess the affected products are advised to refrain from consuming them and to dispose of them safely.