How Many Calories are in a Block of Hartley's Jelly?
                                
                                
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                                    3 min read                                
                            
                                A standard 135g Hartley's jelly block contains approximately 396-399 calories in its dry, concentrated form, while a sugar-free block contains significantly fewer, about 36 calories when prepared. The calorie count for a block of Hartley's jelly depends heavily on the type and preparation.