What are the average calories in a slice of cheesecake?
                                
                                
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                                    3 min read                                
                            
                                A 100-gram slice of plain cheesecake contains, on average, around 321 calories, but this figure can vary dramatically. The exact number of calories in a slice of cheesecake depends heavily on its size, ingredients, and toppings, with some restaurant slices exceeding 1,000 calories.