Free doughnuts are on the menu Friday for National Doughnut Day, also known as National Donut Day in some circles.

Driving the news: June 3 is the made-up food holiday for one of America's favorite treats and national chains, including 7-Eleven, Krispy Kreme and Dunkin', are celebrating with a sugar fix.

The following deals are offered at participating businesses Friday, while supplies last. Some require being signed up for a loyalty program or ordering with an app.

Our thought bubble: The free doughnuts and deals might get you in the door, but businesses are betting that some customers will buy more doughnuts or even a cup of coffee.

What's next: Krispy Kreme will offer up free glazed doughnuts starting Wednesday and continuing through Labor Day when its iconic red "Hot Light" is on.