What is the jelly filling in Dunkin Donuts? Uncovering the Flavor
                                
                                
                                •
                                
                                
                        
                                    
                                    3 min read                                
                            
                                According to reports and ingredient lists, the jelly filling in Dunkin's classic jelly-filled donuts is a combination of apple and raspberry flavors, and often contains apple juice concentrate rather than a high percentage of actual fruit. While many customers assume a straight raspberry or strawberry jam, the truth is more complex and rooted in cost-effective manufacturing.