Wiktionary
donut hole
alt. (context US English) A small ball-shaped pastry, made in the same manner as a donut, roughly the size of the hole in a donut. n. (context US English) A small ball-shaped pastry, made in the same manner as a donut, roughly the size of the hole in a donut.
Usage examples of "donut hole".
Walter stuffed a donut hole in his mouth and scribbled his signature on the last page.