What Krispy Kreme's Famous Glaze Is Really Made From

Ever since it first turned on its neon hot light back in 1937, Krispy Kreme has been serving up its famous glazed donuts straight out of the oven. While Dunkin' Donuts is known for its cake donuts, Krispy Kreme's doughy bombs are made with yeast, which makes them airier and lighter. However, the big thing that sets Krispy Kreme apart from Dunkin' is not the donut itself but what goes on top: the glaze. 

Every donut from the North Carolina-based chain is coated in the sticky sweet deliciousness by undergoing a "warm sugar glaze" waterfall, which LoveFood reports was invented by Krispy Kreme engineers in the 1960's. The glaze is what made Krispy Kreme's signature donut so popular, and what has customers licking their fingers — and coming back for round two. But what exactly is the glaze made of? While Krispy Kreme has never revealed the full recipe, here's what we know about the frosting that fans can't get enough of.

Krispy Kreme's glaze recipe is super secret

Like most restaurants with highly-coveted recipes, Krispy Kreme has never revealed the exact ingredients in its famous donut glaze. According to LoveFood, the chain still uses the original recipe from the 1930's and that it's locked in a vault somewhere. However, plenty of people have tried to guess what's inside the delicious icing. How Stuff Works did an in-depth analysis of the Krispy Kreme manufacturing process and reported that the glaze is "a mixture of sugar, milk and other ingredients." 

Fortunately, there are plenty of copycat Krispy Kreme glaze recipes online that claim to be just as good as the real deal. While they're all slightly different, some of the common ingredients include confectioner's sugar (powdered sugar) and corn syrup. Let The Baking Begin, for instance, calls for confectioner's sugar, milk, and light corn syrup, while Food.com uses butter, confectioner's sugar, hot water, and vanilla extract.