How many calories are in a mini bag of peanut M&M's?
                                
                                
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                                    5 min read                                
                            
                                According to the official manufacturer's nutritional information, a single fun-size (or mini) bag of peanut M&M's contains 90 calories. This popular snack, often handed out during holidays or as a small treat, is a combination of milk chocolate, roasted peanuts, and a candy shell.