What are the ingredients in Costco butter croissants?
                                
                                
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                                    4 min read                                
                            
                                According to Kirkland Signature's own labeling, the main components of Costco's beloved flaky pastries are enriched flour, butter, water, and yeast. A closer look at the complete list reveals several other ingredients that contribute to the distinctive flavor and texture of Costco butter croissants.