Donut hole
A donut hole (also doughnut hole) is a type of donut formed out of small round pieces of dough. Donut holes can be plain or coated in a topping such as glaze, and are a popular dessert in the United States.

History

Origins 
There are several purported origins for donut holes and the "ring" shaped donut. The concept of forming donuts with a hole in the center is commonly attributed to Captain Hanson Gregory, who claimed to have invented the first ring donut after cutting the center of his mother's donut out in 1847.

Many early recipes called for the donut to be formed in the shape of a jumble, a circular cookie with a hole in the center. It has also been suggested that this was invented because donuts cook more quickly when they have a hole in the center.

Popularity 
In 1973, Dunkin' Donuts added "Munchkins" to their menu, selling them in the various flavors of their donuts as a way to use up the dough cuttings taken from the center of their ring donut. The name reportedly stems from the miniature "Munchkin" characters from the 1939 film The Wizard of Oz. The chain had previously unsuccessfully attempted to market them as donut holes before changing their strategy to appeal to younger consumers. However, as of 2021, the company produces donut holes separately from full size donuts. This is common for most donut producers in the 21st Century.  In 1976, Canadian coffee chain Tim Hortons introduced donut holes called "Timbits" to their menu.

Description 
Like regular donuts, donut holes can come in many varieties. The dough itself can fall under the categories of either cake or yeast style. The main difference between the two is that cake style donut holes use a leavener like baking soda or baking powder to bring rise to the bread, while a yeast style donut uses yeast.

References 

American doughnuts