How many calories are in a cheese and onion panini?
                                
                                
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                                    4 min read                                
                            
                                The calorie count for a cheese and onion panini is not a fixed number, with store-bought versions often containing between 300 and over 600 kcal per serving depending on ingredients and portion size. Understanding the variables that influence this can help you make more informed dietary choices when craving this classic grilled sandwich.