How Many Bananas Are in 1 Cup? Mashed vs. Sliced Measurements
                                
                                
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                                    5 min read                                
                            
                                An average medium banana weighs approximately 4.5 ounces, but a recipe's success hinges on more than just weight. The preparation method—whether mashed or sliced—dramatically changes the volume, making it essential to know how many bananas are in 1 cup before you start baking.