I knew custard always contains eggs, but it got me wondering what else is in their recipe, so I decided to check out the website: http://www.kohrbros.com/index.html, which provided some interesting history.
Turns out the recipe was created by Archie Kohr, a schoolteacher from York, PA. He and his younger brothers, Elton and Lester, wanted to expand their family's dairy business so they bought a locally made ice cream machine in 1917. They soon were selling fresh homemade ice cream door to door using a horse-drawn wagon. Tweaking the recipe a bit, they started using less fat and sugar for a smoother, lighter product (the website doesn't say why ... cost perhaps?) But Archie and Elton were not satisfied, so they dismantled the machine, changed some parts and adjusted others. They found their revised recipe worked great with the new machine, and on the advice of their Uncle Sylvester, took the product and machine to the Coney Island boardwalk in 1919, selling over 18,000 cones the first weekend.
To prevent the "Frozen Dessert" from melting too fast in the salt air at the beach, Archie, Elton and Lester added eggs to the recipe as a thickener. Incorporating the revised recipe and machine, they created a light and fluffy product that "tasted just like a custard," and they refer to as "the first and the Original frozen custard." Apparently this is the recipe still used today - dating from 1919! Although the exact recipe is still proprietary and I couldn't find an exact listing of ingredients, the company proudly states that the custard contains grade A milk, cream, sugar and eggs. All I know is that it is delicious - not at all "fake" tasting like other soft serve can be. So, okay maybe it isn't "healthy," but it does contain fresh, wholesome ingredients, which DO make a difference!