It’s a classic summer comfort dish that can stand a little time in the heat at a picnic and brings a zingy zest to the plate. Unfortunately some grocery shoppers may have discovered that their macaroni salad came with an unexpected ingredient.

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On Friday, the U.S. Food and Drug Administration (FDA) published an announcement of a recall that had originated in August. The recall pertained to tubs of Original Freshness Guaranteed brand macaroni salad in two different sizes, both sold at Walmart, with the recall reasoning listed as “foreign material.”

The recall includes 283 cases of macaroni salad, manufactured by Reser’s Fine Foods, Inc., with a Best By date of September 18, 2024, and a UPC code of 78742-02670. Each case reportedly contained six tubs, which likely means the tubs each contained eight ounces.

In addition, seven cases of the Original Freshness Guaranteed macaroni salad in the 16-ounce size were also recalled, containing 12 tubs per case. These affected tubs have a Best By date of September 18, 2024, and a UPC code of 78742-12653.

The recalled cases of both sizes were distributed in Walmarts in nine states: Arkansas, Illinois, Kansas, Missouri, North Carolina, Nebraska, Oklahoma, Tennessee, and Texas.

The manufacturer licenses their products under a Walmart-brand label featuring the Walmart “spark” logo that accompanies the Original Freshness Guaranteed text—but from the available information, it’s not clear whether the product may also be sold via other grocery chains.

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