Is Popcorn with Oil Fattening? The Truth Behind Your Favorite Snack
                                
                                
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                                    4 min read                                
                            
                                According to the USDA, a single cup of oil-popped popcorn contains approximately 41 calories, a small increase from the 31 calories in an air-popped cup. This marginal difference means that plain popcorn with oil is not inherently fattening, but the type and amount of oil, along with other toppings, can significantly impact its calorie and fat content.