Krispy Kreme doughnuts.Gabbi Shaw/INSIDER Dunkin' and Krispy Kreme are two of the nation's biggest doughnut chains. To celebrate National Donut Day on June 7, we pitted their glazed doughnuts against each other. Dunkin's doughnut was dense and cake-like, while Krispy Kreme's was lighter. Krispy Kreme and Dunkin' are two of the biggest doughnut chains, but a few years ago, I wanted to find out which one had the best glazed doughnut.