In the video, TikTok user Kam (@just1kam) shows a bag of Crystal Farms Provolone cheese for sale at a grocery store. Mold can be seen throughout the package, turning the cheese to a blue-grey.
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The 10 Best Cheeses for Melting
You can substitute other types of mozzarella for the ball form (like stracciatella ... to add depth to a grilled cheese ...