"You will never be given hot croissants, bagels, etc. Those are in enclosed boxes and the items must be cooled to below 80 degrees before being packed or it could introduce mold."
"Moisture plus warmth creates an ideal habitat for rapid mold growth, which is why baked goods need to be thoroughly cooled before they go into a sealed vessel."
"Kirkland baked goods are already known for molding quickly, making them one of the most frequently returned items at Costco."
"It's hard to say why they go bad quickly, but it could be due to a lack of preservatives in many products."
Costco's bakery items, including muffins and croissants, are typically sold a few hours to a full day old to avoid mold growth. Packaging hot baked goods can lead to condensation, creating an environment conducive to mold. Employees emphasize that items must cool below 80 degrees before packaging. While some products, like bakery breads, can be sold warm due to vented packaging, many baked goods mold quickly, often due to a lack of preservatives. Proper storage can help maximize their shelf life.
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