A doughnut or donut is a type of leavened fried dough. It is popular in many countries and is prepared in various forms as a sweet snack that can be homemade or purchased in bakeries, supermarkets, food stalls, and franchised specialty vendors. 'Doughnut' is the traditional spelling, whilst 'donut' is the simplified version. Both terms are often used interchangeably in the English-language.