How Many Calories in a Costco Croissant? A Detailed Nutritional Guide
                                
                                
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                                    3 min read                                
                            
                                According to official product listings, a single Kirkland Signature all-butter croissant from Costco contains approximately 300 to 320 calories, making it a surprisingly dense pastry. This flaky favorite is known for its rich buttery flavor, a characteristic that also significantly contributes to its overall calorie and fat content.