Costco shoppers rave about $7 McDonald's dupe

Shoppers are substituting French fries with a $7 dupe available by the five-pound bag at .

Costco influencer Laura Lamb (@costcohotfinds) raved about the $6.79 bag of Kirkland Signature Extra Crispy French Fries in a recent .

Lamb said that she 'couldn't wait to try them' after spotting the fries in a freezer at the popular members-only chain.

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