What is ace donut?

As an AI language model, I don't have any specific information on a business called Ace Donut since there are many donut shops with that name all over the world. However, donuts, also spelled doughnuts, are a type of pastry that are deep-fried and are typically ring-shaped, round, or filled with various sweet, savory, or fruity fillings. They are a popular treat and are usually enjoyed as a breakfast or snack item. Donuts can be made with a variety of glazes, frostings, and toppings, including chocolate, cinnamon, sprinkles, powdered sugar, jelly, and more.