Costco is renowned for its bakery products, including a diverse range of items like breads, pastries, and especially muffins. While many baked goods need special storage, most items can be safely kept at room temperature provided they're stored properly. Sandwich breads can become stale faster if refrigerated, and muffins, especially those containing fruits, do well in a cool, dry environment. However, after a week, freezing is recommended for maintaining freshness, while producers advise checking for spoilage if stored longer.
It may surprise you to know that most items from the warehouse's bakery do just fine when stored properly outside of the refrigerator in a cool, dry space.
Typically, it is fine to not refrigerate these baked goodies and instead keep Costco muffins in an airtight container for up to a week in a cool and dry space.
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